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Icing for Injuries, Tendinitis, and Inflammation

Become a cryotherapy master

updated (first published 2004)
by Paul Ingraham, Vancouver, Canadabio
I am a science writer and a former Registered Massage Therapist with a decade of experience treating tough pain cases. I was the Assistant Editor of ScienceBasedMedicine.org for several years. I’ve written hundreds of articles and several books, and I’m known for readable but heavily referenced analysis, with a touch of sass. I am a runner and ultimate player. • more about memore about PainScience.com
Photograph of an ice cube, isolated on white, representing cryotherapy.

Not sure when to use ice or heat? Get a quick overview in The Great Ice vs. Heat Confusion Debacle, or a detailed look at why you should (almost) never ice low back pain. In general, heating is better for almost anything that isn’t a fresh injury.

Icing — “cryotherapy” for therapy geeks — is an essential injury management skill. Everyone should understand icing the same way everyone knows how to put on a Band-Aid. It is a cheap, effective, drugless method for relieving the pain of injuries. Safe application of ice to your skin can relieve symptoms from sprains, strains, bruises, and tendinitis — virtually any situation in which superficial tissues are inflamed by trauma. Icing could also assist recovery from repetitive strain injuries like tendinitis or iliotibial band syndrome, although that is less clear.

But there also hazards and complications that anyone with chronic pain absolutely needs to know. This article is full of tips and insights about icing that will take you way beyond the basics!

My strained thigh muscle felt like a broken bone at first, but I'm using your icing method and it’s responding brilliantly.

Paul Farley, West Sussex, England

Isn’t inflammation healthy? A brief response to a popular argument against icing

It has been fashionable lately to debunk icing as a treatment because it allegedly interferes with natural healing. Most notably, the physician who first proposed the well-known RICE rehab protocol back in 1978 has actually recanted the I-for-ice part, declaring that “icing delays recovery.” His opinion is now cited almost everywhere this topic is discussed.

Dr. Mirkin’s article is brief and limited to the claim that ice promotes healing. Although that is a popular idea, and an important one to think critically about, there’s a lot more to the topic of icing (as you can see from the depth of this article). Most icing is not done to promote healing, but just to control pain cheaply and safely. That is not a baby I want to throw out with the bathwater: pain relief can be precious! Ironically, after devoting a few hundred words discouraging people from icing, Dr. Mirkin actually concludes his article by recommending small doses of early icing for pain relief:

Since applying ice to an injury has been shown to reduce pain, it is acceptable to cool an injured part for short periods soon after the injury occurs. You could apply the ice for up to 10 minutes, remove it for 20 minutes, and repeat the 10 minute application once or twice.

The question of whether ice promotes or impedes healing is mostly just irrelevant to the value of ice for temporary pain control. But there are at least two significant problems with the argument that icing impedes healing:

  1. The argument that is speculative,1 and contradicted by the clinical evidence. In fact, icing appears to have no effect on recovery at all, good or bad. What few studies we have of this just show no difference.2
  2. The inflammation associated with fresh injuries is indeed mostly biology business as usual, a normal “side effect” of healing. But not all of it! Not everything “normal” in biology is wise and good and never needs to be controlled or treated.3 Diarrhea is natural, too. Inflammation can and does get out of hand, and we know that at least some of it is actually “bad” biology, naturally excessive, that does not benefit us in any way.4

What ice is for

Ice is for injuries. We hope. Science, alas, is not quite so sure.56

If it works, it is useful mainly where tissue are damaged and/or “inflamed.” (Although some things that we think of as “inflamed” aren’t actually inflamed. And vice versa! More about this below.)

Icing is primarily an analgesic — a pain-reliever — and not an actual treatment. That is, it doesn’t “fix” anything. Use it like you use ibuprofen. It may help to resolve chronic problems (much more about this below), but it’s mostly intended to simply numb painfully inflamed or other hurting tissues.

The most commonly iced acute injuries are fresh injuries — ligament sprains, muscle strains, and severe bruises. (When the skin is broken, things get a little trickier.) And what’s a “fresh” injury? Any time tissue has been physically damaged, it will be inflamed for a few days, give or take, depending on the seriousness of the injury. If superficial tissue is sensitive to touch, if the skin is hot and red, if there is swelling, these are all signs that your injury is still fresh, and should definitely not be heated. Heat will increase the circulation and significantly facilitate the immune system activity.

Ice is also often helpful with chronic overuse or tissue fatigue injuries like carpal tunnel syndrome, tennis elbow, supraspinatus tendinitis,7 iliotibial band syndrome, patellofemoral pain syndrome, shin splints, and plantar fasciitis. There are others, of course, but these are the most common.

Ice may also be useful for garden-variety “wear and tear” arthritis, and sometimes the nasty inflammatory arthritides (rheumatoid, ankylosing spondylitis).

What ice is not for (back pain, usually)

Ice can aggravate muscle pain, which is routinely mistaken for an “iceable” injury, especially in the low back.

Back pain is rarely caused by an injury — that is, the pain is rarely caused by inflammation which might be helped by ice. Even in cases where inflammation is present, it is mostly going to be deep in the back under a thick layer of insulating muscle where ice cannot “reach” it.

Meanwhile, back pain almost always does involve muscle pain in the form of muscular trigger points (muscle knots)8 — a small patch of acutely sensitive soft tissue, a poorly understood little patch of sensory misery9 — which are more likely to be aggravated by ice and helped by heat. And so most people with back pain seem to prefer heat, and some have negative reactions to ice. (The situation is similar for neck pain.)

Although experiments have shown that both ice and heat are modestly and equally helpful for low back and neck pain,10 that evidence isn’t exactly bulletproof,11 and here are some good reasons to err on the side of heat in any case.12

But the main reason is that ice is more likely to aggravate the trigger points that are so common in neck and back pain. I recommend that ice should only be used in back and neck pain cases where …

  1. you clearly prefer it (for whatever reason)
  2. there is definitely a fresh injury (a clear mechanism of injury, and obvious inflammation: heat, swelling, redness)

And those cases are surprisingly rare, because the back is much tougher and immune to injury than people think, and also much more prone to painful trigger point activity than most people realize. Indeed, many garden variety aches and pains, especially in younger people, are probably caused not by arthritis and injury as people tend to assume, but by ordinary muscle pain — which tends to be irritated by ice and soothed by heat.

In case of inflammation, apply ice

Icing is traditionally used wherever people suspect inflammation. However, that includes at least three common and surprisingly different biological situations … and different reasons for icing, or not icing.

  1. true inflammation, where you want an immune system reaction (lacerations)
  2. “sterile” injury, with no chance of infection and an unnecessary/excessive immune response (bruises, muscle and ligament tears)
  3. connective tissue degeneration, with little or no classic inflammation (repetitive strain injuries)

The third one in particular is a bit of a revelation for a lot of people. It’s covered in detail below.

Classic inflammation is pretty well understood, and it’s mainly an immune system reaction. When tissue is damaged, the body responds with a complex array of chemical and neurological changes collectively known as inflammation. For instance, the capillaries widen in a big way to bring extra oxygen and nutrients to the area. They also “loosen,” becoming more permeable, to give immune system cells easy access to the injury.13 Most of the pain and discomfort of inflammation is due to this immune system activity.

If the skin is broken (septic injury), there is a risk of infection, and the immune system reaction is essential — a pure physiological goodness. Inflammation in that context is a machine finely-tuned by evolution to optimize recovery, just as a fever is an effective physiological process for fighting infection (indeed, they are closely related processes). Strictly speaking, if you to want to heal well, don’t interfere with inflammation! For broken-skin wounds, use ice only a little to “take the edge off.” And course it’s best to use it in a sterile way, so that you don’t add to the infection risk!

If the skin isn’t broken (sterile injury), things are really quite different! In this context, inflammation is an absurd overreaction that causes collateral damage and excessive pain for no good reason at all — a genuine glitch in biology , with a recently discovered and clear evolutionary explanation.14 There is simply no need for the immune cells to get all fired up for a sterile, internal injury where there is no possibility of infection. Nevertheless, they do get fired up.

The important point here is that inflammation of sterile injuries is truly worse than it needs to be — and it’s quite reasonable to try to suppress it with ice, and anti-inflammatory medications like ibuprofen or Voltaren® Gel. Bet you didn’t know that. Very few people do — this is based on surprisingly new science about that glitch! This treatment logic was unavailable until quite recently.

Of course, the immune system reaction is not the only reason injuries hurt. Damaged cells put out many kinds of distress signals. As with most biological processes, our comfort is not really a priority. In fact, quite the opposite — injury and inflammation have partly evolved to be painful. Cavemen didn’t have ibuprofen and ice, nor did they have the benefit of understanding inflammatory chemistry. In the big picture, super painful inflammation was good for our species: victims were encouraged to stay relatively still while inflammation ran its course like a fever!

But for modern humans, inflammation is … well, it’s overkill. We can afford to “turn it down.” We can ignore the warning of the inflammation, to a point, and especially if we’re confident that we don’t really need an immune system reaction (for a sterile injury). Ice can only turn it down so much anyway, so there’s no risk of missing the pain alarm entirely!

In theory, cold slows metabolic activity, numbs nerve endings, constricts capillaries. It limits and controls inflammation. It makes it hurt less. It helps us get through the day. And that’s an especially good thing for the common sterile injuries, where the inflammation is largely pointless.

There’s yet another kind of “inflammation”…

Chronic “inflammation”? Not so much, actually

Do you have a chronic overuse injury? Shin splints for two years? Plantar fasciitis for five? Then you are probably thinking, “Inflammation is not @#!!$% a valuable warning signal!” It’s more like an annoying car alarm.

Right you are. Sort of.

What’s going on in a repetitive strain injury like runner’s knee or tennis elbow or Achilles tendinitis is not really inflammation, per se, except perhaps in the earliest stages,15 but erratically painful degeneration1617 — tissue rot, which has more in common with arthritis than inflammation. The chemistry of these situations is very different than classic inflammation, and in particular involves relatively little immune system activity. The most obvious implication of this is that medicines intended to suppress immune system activity — the anti-inflammatories — are obviously not going to work well. And they don’t.

So what of ice, then? The most basic of all anti-inflammatory treatments? Ice can relieve many kinds of pain temporarily by numbing nerve endings, of course. But does it do anything else?

If ice can help a repetitive strain injury in any way beyond brief numbing, no one has ever actually proven it, or shown how it might work. There’s little doubt that it’s relieving in the short term, and there is some reasonable speculation that it could stimulate miscellaneous minor tissue healing processes. Virtually any stimulatory input to the body, up to a point, can provoke a healthy, adaptive response — the use-it-or-lose-it principle. Stress a tissue, and it will probably get a bit tougher. Maybe.18 In broad strokes, that is probably the only plausible therapeutic mechanism of icing. Ice may simply be one of the easiest delivery systems for a bit of non-toxic stimulation — a way to stimulating tissue without overloading it, while simultaneously getting some temporary pain relief from numbing. However, it certainly isn’t “anti-inflammatory”!

It’s worth doing. The great advantages of ice as a treatment are not its impressive biological effects — unknown and unproven! — but its thrift, ease, and safety: treatment options simply don’t get any more innocuous while still having some plausible mechanism of benefit. Therefore ice remains firmly on my “worth a shot” list for RSIs. Keep your expectations low, but there are virtually no risks, other than ice burn (which takes at least a couple minutes of raw ice application, probably twice that).

Bad icing news based on new data

What if ice actually doesn’t do anything for inflammation? What if it actually made it a little worse? Could you even tell? There is actually research that shows this.

A small 2013 study for severe muscle soreness had “unexpected” results, according to the researchers: it seemed to do more harm than good.19 The icing victims had higher blood levels of molecules associated with muscle injury and they felt more fatigued. Icing had no effect on recovery of strength, or any biochemical sign of inflammation. A small study, to be sure, but how good can icing be if it can generate this kind of data?

That study was specifically focussed on post-exercise muscle soreness, a very specific biological situation that is essentially impossible to treat.20 Even if this data is right, it doesn’t necessarily mean that ice is bad news for other kinds of pain and injury. Icing probably has different effects depending on the situation (which should be very clear after the last couple sections), and it’s particularly clear that it has useful effects on severe inflammation following trauma.

But this is sobering news for ice enthusiasts. It is possible that the main effect of ice is temporary numbing, which actually just makes it difficult to tell if you’re actually a little better or a little worse an hour later. It’s hard to judge a subtle change after a big one!

The competition: common pain meds

Over-the-counter (OTC) pain medications21 are probably the only self-prescribed treatment for pain and fresh injury more common than ice/heat, but their risks and benefits could not be more different. They are quite safe in moderation, but there are serious concerns most people are unaware of,22 and the best argument in favour of ice may be the relatively unknown problems with these drugs.

Don’t take any pain killer chronically — risks go up with exposure. acetaminophen is good for fever and pain, and is one of the safest of all drugs at recommended dosages, but it’s surprisingly easy to take too much, which can badly hurt livers23 … and it doesn’t work well (at all?24) for musculoskeletal pain. The NSAIDs are a better bet:25 they reduce inflammation as well as pain and fever, but at any dose they can cause heart attacks and strokes and they are “gut burners” (they can badly irritate the GI tract, even taken with food, and especially with booze). Aspirin is usually best for joint and muscle pain, but it’s the most gut-burning of them all. Voltaren® Gel is an ointment NSAID, much safer for treating superficial pain.

Use raw ice

An excellent method of therapeutic icing is to use bare or “raw” ice — that is, ice applied directly to the skin, with no layer of plastic or fabric between you and your ice.

Raw ice delivers more of an icy punch! This is due to the spreading of melt water into every crevice, which conducts heat more efficiently away from the skin both directly into the ice, and via evaporation.

In comparison, gel packs and bean bags are comparitively wimpy cryotherapies (although they have their place, as you’ll see). They tend to warm up too quickly (especially where the skin is hottest and needs the most icing), and they sometimes cannot shape themselves well (or gently) to the contours of the injured body part. There are times when they are handy or easier when the stakes are low, but for serious icing of acute injuries or a stubborn tendinitis, you really need an ice cup.

A styrofoam cup is an elegant delivery system for raw ice …

How to make an ice cup

The humble styrofoam cup is the cheapest and most effective injury management tool in my office and in my own home. It’s not the cup itself that’s so useful, of course, but its contents — ice! Don’t wait until you’re hurt to do this — have them ready and waiting.

Illustration of how to make an ice cup. It shows two images, before an after: a Styrofoam cup full of ice with a dotted line about an inch below the lip of the cup, and then the same cup again with the top cut off, exposing the ice.

  1. Get yourself some styrofoam cups.
  2. Fill a few cups with water, and freeze them.
  3. Cut off the top inch of the cup, exposing the ice but leaving the rest of the cup as an insulating “handle.”

If you hold it in a towel while applying, that often helps control the drippings (depending on location).

Or just use an ice cube

In a pinch, with no cups around, just use an ice cube directly held in a dishtowel — almost as good! Less convenient for larger areas, but nearly as effective for most uses. Over the years I’ve found that, despite the best intentions, 9 times out of 10 that I need an ice cup, I haven’t actually got one ready in the freezer, and I end up using ice cubes at first.

Commercial ice cups

One of the downsides of the styrofoam cup option is that it’s a tiny bit wasteful. Wouldn’t it be better to have a re-usable plastic cup designed for the same purpose? There are several brands of ice cups, like the CRYOCUP™ and the Pro-Tec Ice-Up Portable Ice Massager. I’ve never used one personally, but they seem like a great idea, especially for anyone who lives on the edge and brings home new sports and adventure injuries on a regular basis.

In fact, there are even insulated icing tools designed to be taken to the field or the mountains or wherever you think you might need ice.

And although it’s not at nice as ice, an alternative worth mentioning is a simple chemical ice pack — the kind you crush to activate. Despite their inferiority (they aren’t as cold as ice and won’t last as long), I have succumbed to their convenience, and these are what I’ve actually been taking on expeditions for a while now.

Picture of two ice massage products.

The art of icing: when you’re numb, you’re done

Slide the ice over the inflamed area in a slow but steady pattern. It’s important to keep moving, as long as you don’t try to ice such a large area that tissue gets a chance to warm up before you return to the starting point.

Continue ice massaging for 1–3 minutes, or until it is numb, whichever comes first — no more. “When you’re numb, you’re done,” is the rule of thumb for safety (see next section). Areas with thick tissue, like the top of the thigh, will take longer to get numb. Thin areas, like the side of the knee, will usually go numb quickly.

What does numb feel like? Just close your eyes and lightly touch the skin. If you can’t feel it at all, or if you can feel only pressure, that’s numb enough. Stop icing and let the tissue warm up.

Can raw ice “burn” you?

Yes. You may have heard that bare ice is too cold to use directly on the skin in this way. That’s untrue for short periods. Although a cold-sensitive person may find raw ice too uncomfortable, tissue damage can only occur after sustained icing — well after you have gone completely numb, at least 3 minutes. Stopping roughly when you get numb pretty much guarantees that you won’t hurt yourself.

An ice treatment will feel like it is burning or stinging at first, and that’s okay. Icing this way can feel a bit nasty, especially at first in certain locations, but stick with it: the powerful anti-inflammatory effect is worthwhile. In many situations, this is a much better solution than an anti-inflammatory medication.

Ice repeatedly

Once your tissues warm up again, you can repeat the treatment. In fact, you can apply the ice as often as you like, as long as your tissues have a chance to mostly warm up between treatments. In the case of tenditis, you can continue doing a lot of icing — many applications per day — as long as you still have symptoms, and even when you are feeling better.

In the case of injuries, icing is mostly just useful while the injury is still hot, red, swollen or painful — this phase may last for a few hours or several days. When these signs begin to fade, you may be certain that you would have been stuck with them for a lot longer if you had not been icing.

Power icing

People often tell me that they have “tried icing” for an overuse injury like iliotibial band syndrome. A little quizzing usually reveals that this means that they have occasionally applied ice once or twice in a day, only when the need felt greatest. That is not really enough to know whether or not icing is going to help you.

Power icing is the name I’ve given to icing in megadoses — 20–50 applications of ice per day for 3–20 days at a time. As long each dose is no more than three minutes, and if you allow sufficient opportunity for tissue to warm up between applications, this is not risky — the worst case scenario is that you’ll waste your time.

I prescribe power icing only for serious chronic overuse injuries, especially the common tenditises (mostly tennis elbow), plantar fasciitis, some cases of carpal tunnel syndrome, iliotibial band syndrome, patellofemoral pain syndrome, and some kinds of shin splints.

Unfortunately, I have no scientific evidence that this works! It seems to make a certain amount of sense — more of a good thing? — and I have had some success with it with my own clients, a few slightly amazing recoveries with just a few days of power icing. Generally speaking, there is no excuse for prescribing self-treatments that lack even a clear rationale, let alone research evidence that they work. However, this one can be justified simply because it is low cost and low risk — so it is worth a shot!

I also prescribe power icing simply to make sure that people giving “normal” (lower dosage) icing a fair shot. Sometimes I will sneakily prescribe 50 applications of ice per day, knowing full well that the “type A” client isn’t actually going to fit in more than about one third that much — and that’s actually good enough for me.

The inevitable question with power icing is “how much?,” a conversation I find myself having with clients even after the numbers have been laid out. One way of clarifying is simply to say that it should be so much icing that you start to get sick of it. If you’re not thinking, “Wow, geez, this is really a lot of icing!” then you should probably do more.

If it doesn’t seem to be working within 3-5 days, it’s probably not going to do the trick for you. But I strongly recommend that you give it at least three days, so that you can be certain that you really have “tried icing!”

Use an ice cup with an ice gel for stronger cooling

You can definitely enhance the effect of icing by using an ice gel afterwards. This is different than the gel-packs — it’s a goopy blue paste in a jar that feels very cold when you rub it into your skin. A variety of brands are available at any larger drugstore. There is one downside to this technique: if your goal is to do many sessions of icing, your skin tissue takes much longer to warm up between sessions when you’ve applied an ice gel.

When to use gel packs instead of raw ice (the tissue depth issue)

If you want to try to chill deeper, thicker tissues, you need gentler, slower cooling. Raw ice is just too cold to leave on for longer periods. Ice packs to the rescue! Raw ice can probably chill the skinny joints of the hands and feet thoroughly and fairly quickly, and even knees and elbows, but hips or shoulders and spinal joints are deep.

You can also use fabric or towels to further ease the intensity of a gel pack, so that it can be used safely for even longer periods.

How cold, how deep? The effect of ice on tissue temperature

Thermoregulation of our tissues is extremely efficient: reflex responses in microvasculature can compensate quite a lot for changes in surface temperature. So what happens to the tissue temperature under ice? How cold does it get? At 1 centimetre? At 3? Can you chill a knee through and through?

Turns out you can! Most joints are less insulated and adapt to regulate their temperature, and can be cooled or heated much more easily. In experiments on arthritic knees, Oosterveld et al demonstrated that hot wax (ligno-paraffin) could raise deep knee temperatures by 1.7–3.5˚C … and the effect of cooling was even more dramatic, dropping the temperature as much as 9˚C. Brrr! That’s likely to have some effect on biology.

The effect on muscle is probably much less, but to date I’m unaware of any data that shows it.

To go deeper into this topic, see Icing, Heating & Tissue Temperature.

You are now a cryotherapy master

If you’ve read this far, you now know much more about icing than most people, and indeed most health care professionals. Congratulations!


About Paul Ingraham

Headshot of Paul Ingraham, short hair, neat beard, suit jacket.

I am a science writer, former massage therapist, and I was the assistant editor at ScienceBasedMedicine.org for several years. I have had my share of injuries and pain challenges as a runner and ultimate player. My wife and I live in downtown Vancouver, Canada. See my full bio and qualifications, or my blog, Writerly. You might run into me on Facebook or Twitter.

What’s new in this article?

Five updates have been logged for this article since publication (2004). All PainScience.com updates are logged to show a long term commitment to quality, accuracy, and currency. more Like good footnotes, update logging sets PainScience.com apart from most other health websites and blogs. It’s fine print, but important fine print, in the same spirit of transparency as the editing history available for Wikipedia pages.

I log any change to articles that might be of interest to a keen reader. Complete update logging started in 2016. Prior to that, I only logged major updates for the most popular and controversial articles.

See the What’s New? page for updates to all recent site updates.

AprilRewrote “What ice is not for (back pain, usually)” for clarity and thoroughness.

AprilUpgraded rebuttal to the argument that icing impedes healing.

2016Minor revision. Some more commentary about the popularity of debunking icing lately.

2016Added evidence of efficacy of NSAIDs for common injuries.

A series of substantial upgrades, details unlogged.

2004Publication.

Notes

  1. It’s based mostly on indirect evidence and the “common sense” that we shouldn’t interfere with normal healing processes. But this assumes both that ice can actually interfere significantly, and the inflammation is always a good thing (see next point). None of the evidence Dr. Mirkin present is direct clinical evidence of what actually happens when people ice or don’t ice. BACK TO TEXT
  2. See Collins and Malanga, both cited and described in some detail right at the start of the next section. BACK TO TEXT
  3. It’s a common misconception that “biology knows best,” but it really does not. Evolution is a wondrous but peculiar process that leads to many compromises, tradeoffs and sacrifices, and absurd unintended consequences. Biology is optimized for reproduction early in life, which only partially aligns with our interests. BACK TO TEXT
  4. Research has shown that immune cells unnecessarily “swarm” sterile injury sites, causing damage and pain — a biological glitch with profound implications about why some painful problems are so severe and stubborn. For more information, see Why Does Pain Hurt? How an evolutionary wrong turn led to a biological glitch that condemned the animal kingdom — you included — to much louder, longer pain. BACK TO TEXT
  5. Collins NC. Is ice right? Does cryotherapy improve outcome for acute soft tissue injury? Emerg Med J. 2008 Feb;25(2):65–8. PubMed #18212134.

    Bafflingly, therapeutic icing (cryotherapy) is one of really those basic things that you’d think modern medical science would have mastered by now, but no — not even close!

    This is a 2008 review of the inadequate evidence: just six experiments, and only two of them any good, one with slightly positive results and the other showing nothing at all. So that’s two studies that showed little or no benefit, which is leaning towards bad news, but it’s not enough data to clinch it.

    Four animal studies have showed that icing reduced swelling (and too much is harmful, duh!). That evidence is mildly encouraging, but of course we can’t take animal studies to the bank.

    This really just isn’t enough data, and the bottom line is that we don’t know, which is what Collins concluded: “there is insufficient evidence.” A 2015 review (with a broader scope, see Malanga) had a similar non-conclusion, mostly confirming the absence of evidence.

    BACK TO TEXT
  6. Malanga GA, Yan N, Stark J. Mechanisms and efficacy of heat and cold therapies for musculoskeletal injury. Postgrad Med. 2015 Jan;127(1):57–65. PubMed #25526231.

    Although it’s 2015, “most recommendations for the use of heat and cold therapy are based on empirical experience,” not evidence, because the only evidence we have is still “limited.” Malinga, Yang, and Stark review the alleged benefits of heat and cold: pain relief for both, of course, plus ice reduces “blood flow, edema, inflammation, muscle spasm, and metabolic demand,” while heating increases “blood flow, metabolism, and elasticity of connective tissues.” Even these aren’t well-tested, and there are other possibilities that haven’t been tested at all.

    Based on a handful of relevant trials, they concluded that “heat-wrap therapy provides short-term reductions in pain and disability in patients with acute low back pain and provides significantly greater pain relief of DOMS than does cold therapy.”

    But the main take-home message from this paper is just “much more study needed.”

    BACK TO TEXT
  7. About “tendinitis” versus “tendonitis”: Both spellings are considered acceptable these days, but the first is technically correct and more formal, while the second is an old misspelling that has only achieved respectability through popular use. The word is based on the the Latin “tendo” which has a genitive singular form of tendinis, and a combining form that is therefore tendin. (Source: Stedmans Electronic Medical Dictionary.) BACK TO TEXT
  8. This is a pet theory of mine that I have examined and re-examined constantly for a decade. Although no evidence directly supports it — no convenient citation — I’ve based it on a lot of indirect evidence and many other considerations. I summarize the arguments in Back Pain & Trigger Points, and I’ve written (very) extensively on the topic in my low back pain tutorial. BACK TO TEXT
  9. Trigger points are probably contracted, stagnant, swampy, irritated patches of muscle tissue — a minor soft tissue lesion — but that’s just a controversial theory (see Trigger Point Doubts). No one doubts that these sensitive spots in muscle are common, however. They can cause anything from stiffness and dull aching to show-stopping agony. The pain often spreads in confusing patterns, and they grow like weeds around other painful problems and injuries, making them interesting and tricky and incredibly common. BACK TO TEXT
  10. Garra G, Singer AJ, Leno R, et al. Heat or cold packs for neck and back strain: a randomized controlled trial of efficacy. Acad Emerg Med. 2010 May;17(5):484–9. PubMed #20536800.

    What’s better for neck and back pain — ice or heat? This experiment, conducted at a university-based emergency department, compared the effectiveness of these two common treatments. Everyone studied received 400mg of ibuprofen orally and then thirty patients were given a half hour of either a heating pad or a cold pack.

    The researchers concluded that adding heat or cold to ibuprofen therapy did not change the result. Both heat and cold resulted in “mild yet similar improvement in the pain severity.” They recommend that the “choice of heat or cold therapy should be based on patient and practitioner preferences and availability.”

    BACK TO TEXT
  11. The research just cited probably isn’t the last word on the topic: it’s findings were based on a comparison of ice and heat for acute back pain in a hospital setting, where whatever the doctor prescribes — ice or heat — is extremely likely to have a major effect on how you feel about it. The evidence is interesting, but not really much of a guide, because “it depends” too much on too many contextual factors. BACK TO TEXT
  12. Some reasons heat is probably better for back and neck pain:

    • Some evidence does suggest heat is more a more effective analgesic for back pain (see French; it’s far from decisive, but the results do favour heat a little).
    • Heat is much more emotionally “reassuring,” and people with back and neck pain often need reassurance more than anything else (the “mind game” in neck and back pain is huge). Excessive and unwelcome temperature in either direction is going to seem like a threat to your nervous system, but cold is more neurologically menacing than heat on average.
    • It’s unlikely that either ice or heating actually facilitates healing, but if one of them does even a little, my money is on heat.
    BACK TO TEXT
  13. The tiny capillaries are made of cells that are shaped into a tube, like children making a tunnel from their legs to crawl through. The cells literally just pull apart a bit, enlarging the spaces between them. The circulation becomes like a stream tumbling down a rocky mountainside — it mostly follows the path of least resistance in a loose channel, but there’s lots of spilling. That’s what circulation is like in an inflamed area: wet and sloppy, with some cells staying in the capillaries and others coming and going constantly. BACK TO TEXT
  14. PS Ingraham. Why Does Pain Hurt? How an evolutionary wrong turn led to a biological glitch that condemned the animal kingdom — you included — to much louder, longer pain. PainScience.com. 5139 words. Research has shown that immune cells (neutrophils) unnecessarily “swarm” sterile injury sites, causing damage and pain with no known or likely benefit as a tradeoff. It’s just a clear error: they appear to have mistaken mitochondria for a foreign organism, a legacy of ancient evolutionary history, and a biological glitch with profound implications about why some painful problems are so severe and stubborn. BACK TO TEXT
  15. Millar NL, Hueber AJ, Reilly JH, et al. Inflammation Is Present in Early Human Tendinopathy. Am J Sports Med. 2010 Jul. PubMed #20595553. BACK TO TEXT
  16. Cook JL, Purdam CR. Is tendon pathology a continuum? A pathology model to explain the clinical presentation of load-induced tendinopathy. Br J Sports Med. 2009 Jun;43(6):409–16. PubMed #18812414.

    A well-written and important bird’s eye view of the subject of tendinopathy, presenting an updated way of thinking about the problem. Highly recommended, required reading for professionals.

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  17. Khan KM, Cook JL, Taunton JE, Bonar F. Overuse tendinosis, not tendinitis, part 1: a new paradigm for a difficult clinical problem (part 1). Phys Sportsmed. 2000;28(5):38–48. PubMed #20086639.

    From the abstract: “If physicians acknowledge that overuse tendinopathies are due to tendinosis, as distinct from tendinitis, they must modify patient management …”

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  18. There are two “laws” of tissue adaptation, one each for hard and soft tissue: Wolff’s law covers bone, but Davis’ law for soft tissue — muscles, tendons, and ligaments, fascia — is relatively obscure and imprecise. Many treatments are based on the idea of forcing adaptation or “toughening up” tissues. It has always been a reasonable idea, but what’s the “right” amount and kind of stress? Results vary widely. Icing counts as one of these dubious approaches to stimulating tissue healing, but is generally much safer, cheaper and easier to try. For more about tissue adaptation, see Tissue Provocation Therapies. BACK TO TEXT
  19. Tseng CY, Lee JP, Tsai YS, et al. Topical cooling (icing) delays recovery from eccentric exercise-induced muscle damage. J Strength Cond Res. 2013 May;27(5):1354–61. PubMed #22820210.

    ABSTRACT


    It is generally thought that topical cooling can interfere with blood perfusion and may have positive effects on recovery from a traumatic challenge. This study examined the influence of topical cooling on muscle damage markers and hemodynamic changes during recovery from eccentric exercise. Eleven male subjects (age 20.2 ± 0.3 years) performed 6 sets of elbow extension at 85% maximum voluntary load and randomly assigned to topical cooling or sham groups during recovery in a randomized crossover fashion. Cold packs were applied to exercised muscle for 15 minutes at 0, 3, 24, 48, and 72 hours after exercise. The exercise significantly elevated circulating creatine kinase-MB isoform (CK-MB) and myoglobin levels. Unexpectedly, greater elevations in circulating CK-MB and myoglobin above the control level were noted in the cooling trial during 48-72 hours of the post-exercise recovery period. Subjective fatigue feeling was greater at 72 hours after topical cooling compared with controls. Removal of the cold pack also led to a protracted rebound in muscle hemoglobin concentration compared with controls. Measures of interleukin (IL)-8, IL-10, IL-1β, and muscle strength during recovery were not influenced by cooling. A peak shift in IL-12p70 was noted during recovery with topical cooling. These data suggest that topical cooling, a commonly used clinical intervention, seems to not improve but rather delay recovery from eccentric exercise-induced muscle damage.

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  20. PS Ingraham. Delayed Onset Muscle Soreness (DOMS): The biological mysteries of “muscle fever,” nature’s little tax on exercise. PainScience.com. 9685 words. BACK TO TEXT
  21. There are four kinds: acetaminophen/paracetamol (Tylenol, Panadol), plus three non-steroidal anti-inflammatories (NSAIDs): aspirin (Bayer, Bufferin), ibuprofen (Advil, Motrin), and naproxen (Aleve, Naprosyn). BACK TO TEXT
  22. Science Based Pharmacy [Internet]. Gavura S. How risky are NSAIDS?; 2015 Jul 25 [cited 16 Aug 18]. BACK TO TEXT
  23. FDA.gov [Internet]. Acetaminophen and Liver Injury: Q & A for Consumers; 2009 Jun 4 [cited 16 Aug 31].

    “This drug is generally considered safe when used according to the directions on its labeling. But taking more than the recommended amount can cause liver damage, ranging from abnormalities in liver function blood tests, to acute liver failure, and even death.”

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  24. Machado GC, Maher CG, Ferreira PH, et al. Efficacy and safety of paracetamol for spinal pain and osteoarthritis: systematic review and meta-analysis of randomised placebo controlled trials. BMJ. 2015;350:h1225. PubMed #25828856. PainSci #54220. BACK TO TEXT
  25. Derry S, Moore RA, Gaskell H, McIntyre M, Wiffen PJ. Topical NSAIDs for acute musculoskeletal pain in adults. Cochrane Database Syst Rev. 2015;6:CD007402. PubMed #26068955. BACK TO TEXT