Sometimes shoulders just seize up, painfully and mysteriously, for several months: frozen shoulder.[Mayo] The shoulder is the only joint that “freezes” like this (there is no “frozen knee” or “frozen hip”1). While other joints may suffer related fates, frozen shoulder is a unique biological puzzle, and yet common. Frozen shoulder is difficult to define precisely, diagnose accurately, or treat effectively. It’s one the best examples of how musculoskeletal medicine is surprisingly primitive still.
Good news, though: frozen shoulders almost always thaw!2 The condition usually retreats as mysteriously as it attacks, within 10 months if you’re lucky, up to two years if you’re not. A few people will continue to have trouble for much longer.3
Adhesive capsulitis [Wikipedia] is the more formal term for frozen shoulder: it describes the characteristic stickyness that develops in the shoulder joint capsule. Sticky shoulder is probably a better name.
Range of motion fails, usually just on one side.4 Most patients first notice that they are having trouble reaching behind bra clasps, wallets, and back itches. About two thirds of patients are women.
Frozen shoulder is more like a disease than most common musculoskeletal problems. It is a biological failure, not a biomechanical one. It is not a repetitive strain injury.
It probably is a symptom of broader health problems. It mostly hits people over the age of forty, much more so if you have diabetes and/or cardiovascular disease.5 Those problems are commonly associated with obesity, and what they have in common is “metabolic syndrome” [NIH] — trouble with managing fats and sugars in the blood, and chronic low-grade inflammation everywhere.
Chronic low grade inflammation is increasingly seen as a part of other orthopaedic conditions such as osteoarthritis — once considered a ‘cold’ wear and tear problem (as opposed to the far more overt and ‘hot’ inflammation of rheumatoid arthritis).
Summer is coming — Frozen Shoulder, Cocks (Noijam.com)
No one knows why the shoulder joint capsule in particular would be the tip of this dysfunctional iceberg. Why such a dramatic point of failure? Why that tissue in particular? No one knows. But the relationship between frozen shoulder and metabolic syndrome is clear, as well as other glitchy biology like hyperthyroidism.6 It is one of many conditions that fall short of frank, diagnosable autoimmune disease like rheumatoid arthritis or lupus, but are still obviously autoimmune in character and characterised by inflammatory over-reaction.
Revealingly, smoking is a major risk factor for shoulder problems,7 probably including frozen shoulder. Smoking probably contributes to the poor health that frozen shoulder is an expression of. Smoking is a well-known factor in many kinds of chronic pain.8
An interesting theory is frozen shoulder occurs because “the human shoulder evolved for high speed projectile throwing” (Pietrzak 2016), and it suffers from neglect in modern living. Sedentary tissues can cause trouble, and be more vulnerable to biological failure. In particular, Pietrzak suggests, injury near the shoulder might trigger an inflammatory reaction that’s just waiting to happen.
I think it’s unlikely that the shoulder actually “evolved” for that purpose in the first place,9 and, even if it did, why would the shoulder be the only anatomy in the body with this problem? Surely many body parts tend to stagnate in modern living, and yet — as already noted — only shoulders “freeze” like this.
But there’s some strong support for Pietrzak’s idea. In 2013, Littlewood et al. made a detailed argument that the symptoms of rotator cuff tendinopathy — and the shoulder joint capsule is essentially just a bunch of rotator cuff tendons — can occur without any actual or impending tissue damage.10 First they make the case that explanations for pain based on “peripherally driven nociceptive mechanisms secondary to structural abnormality, or failed healing, appear inadequate” — at least in the context of rotator cuff tendinopathy (and probably much else). They’re on firm ground with that premise. So what is the problem? They propose that the brain may react to relative overuse of de-conditioned tendon — tendon that’s just been lazing around too much — with fearful avoidance of movement, a vicious cycle of painful inhibition of function. This is completely consistent with Pietrzak’s idea. And “functional freezing” is the next major topic…
“Adhesive” capsulitis refers to a literal stuckness, and there’s no question that many or most frozen shoulders are literally stuck in a limited range. But could some frozen shoulders be less literally stuck? Could that stuckness sometimes be more of a functional limitation than a physical one? Is it even possible that many cases are at least partially like this? What if, say, 60% of cases were 30% explained not by sticky joint capsule, but by an extreme reluctance to move (neurological inhibition)?
And could functional limitation be more prevalant in cases that are dragging on and on? Do some people slowly climb out of the frying pan of a sticky joint capsule and into the fire of a shoulder that’s just too uncomfortable to move? What if the door of shoulder movement stealthily transitioned from welded shut to just being rusted shut?
There’s hope in them thar hills, because a functional stiffness might be easier to loosen up (with massage, say, or carefully planned exercise). And yet the opportunity might be tragically missed! How would a patient even know that the situation had changed? There’s no easy way to tell that something badly stuck is less badly stuck that it used to be.
I’ve used a lot of questions to introduce this topic because — surprise surprise — no one actually knows. It’s a popular idea,11 but there is no compelling direct evidence of it. We mostly just have an accumulation of evidence that the usual suspectsaren’t cutting it, evidence that we’re missing something (which is what Littlewood et al is all about). And we have clinical stories that seem to suggest it.12 If it’s true, it’s going to be hard to prove. And it hasn’t been a focus of research because it’s so clear that most cases, and probably the worst ones, really are dominated by adhesion — that’s the bigger problem. Worrying about a functional limitation, especially in the earlier stages of freezing, may be like trying to sweep up the ashes while the fire is still raging. But later on…
The possibility shouldn’t be completely ignored.
There are two main ways that a functional limitation of shoulder ROM would probably work, and we shouldn’t underestimate the power of either of them:
The brain is the boss of all function, and when it decides that a joint shouldn’t move, then it’s not going to move — and because your conscious mind isn’t included in the decision, the limitation can feel externally imposed. Your shoulder might as well be in vice. Inhibition doesn’t feel “functional”: it just feels like you can’t move. Will power doesn’t come into this. Your brain is protecting you from yourself. This is standard neurological procedure with severe traumas.
Trigger points are a tough topic, because no one really knows exactly what they are, but there’s no question that people often develop sensitive spots in soft tissue. Although their nature is unexplained and controversial,13 the usual way of explaining them seems like a great fit for frozen shoulder: “tiny cramps” in the muscle would make it uncomfortable, weak, and less stretchy, like a knotted bungie cord. If the rotator cuff and other shoulder muscles were full of trigger points, perhaps the net effect would feel an awful lot like literal “freezing.”
Further on in the tutorial, I’ll discuss disinhibition strategies, and the (hopelessly imperfect) options for trying to treat trigger points.
Frozen shoulder isn’t hard to diagnose — or rather, it shouldn’t be. Physical therapist and shoulder guy Adam Meakins sees “a lot of frozen shoulders,” but also “many who have been told they have frozen shoulder who clearly do not.”14 There can be confusion with other conditions (reviewed below). The defining symptoms of frozen shoulder are:
Other than the slow-but-steady loss of mobility, there’s one particularly strong defining symptom (“pathognomonic”) that’s good to know about, but you might never notice if you don’t go looking for it. It occurs in more than 95% of cases, but only in 10-15% of other kinds of shoulder pain. It’s sensitivity on a specific spot on the front of the shoulder, on the tip of a bone called the coracoid process.17 This odd little bone points forward like a finger, just below the end of the collar bone. If you feel around in the tissue there, it’s hard to miss — and if it hurts quite a bit (more than 3 on a scale of 10, say), that’s the sign you’re looking for.
These are presented roughly in order of how much they can seem like frozen shoulder, briefly explaining them and highlighting the major differences:
Rotator cuff tendinopathy or tear. The rotator cuff is a group of four muscles that surrounds the shoulder joint like a “cuff,” and that cuff is anatomically overlapping the joint capsule that gets inflamed in frozen shoulder — which is why rotator cuff problems can be difficult to distinguish from frozen shoulder. Confusing things even more, rotator cuff trouble might make movement uncomfortable, as with frozen shoulder, but not necessarily. Rotator cuff abnormalities and lesions increase steadily later in life, like arthritis, but are also amazingly common in pain-free younger people — in other words, even there’s an “obvious” problem on an X-ray or MRI, it ain’t necessarily the problem.18 But the rotator cuff can hurt, and when it does, it mostly limit active movement, whereas frozen shoulders are frozen even when you are relaxed and someone else tries to moves your shoulder for you (passive movement). And tears tend to happen suddenly with exertion, a clear “oh shit” moment of injury. And with tears or tendonitis, the pain is usually limited to more specific spots and movements than with frozen shoulder.
Subacromial and subdeltoid bursitis are closely related to rotator cuff tendonitis, but instead of tendons they affect bursae (the anatomical padding between tendons and other structures).
Arthritis of the big shoulder joint mostly occurs beyond middle age, and usually develops more slowly-but-steadily, and isn’t as severe. An X-ray will show clear signs of joint degeneration that won’t be seen with adhesive capsulitis. Shoulder arthritis often involves a history of injury.
Acromioclavicular arthropathy is degeneration of the joint at the outside end of the collar bone. It does not really affect shoulder range of motion, the pain is more specific to that superficial joint, and it’s usually associated with a history of overuse and injury, usually athletic.
Tendonitis of the biceps tendon. Tenderness sticks to the front of the shoulder with this condition. Biceps contraction is painful, but other movements are normal.
Cervical disk degeneration, basically arthritis of the spine, can cause pain, weakness, and numbness that spreads out into the shoulder and can make it seem “frozen,” but this problem usually also spreads further: symptoms in the hand and wrist will usually be more prominent with this problem.
Autoimmune diseases like lupus or rheumatoid arthritis can affect many joints in the body, including the shoulder — but they usually do affect multiple joints, and cause several other health problems that obviously set them apart.
Cancer is one of the least likely causes of frozen-shoulder-ish pain, but a tumour in or near the joint is a possibility. Watch out for other signs of failing health, especially night sweats and weight loss and shortness of breath.
It’s not a bad idea, but the “need” part can be debated. An x-ray is potentially helpful for excluding shoulder joint arthritis or scary causes of pain like a tumour, but some professionals will sensibly advise against it because frozen shoulder is quite distinctive clinically, because it’s rare for a sinister condition to masquerade as frozen shoulder, and because x-ray isn’t exactly a foolproof method of detecting other causes anyway. Other pros think an x-ray is a no-brainer and well worth the minor (radiation) risks of a single x-ray to check for surprises before proceeding with therapy.19 There is no evidence-based right answer to this.
Every professional seems to have their own take on frozen shoulder treatment, even doing nothing at all: some believe it should just be left alone to run its course. Everyone mostly agrees about basic treatment efforts, but there are many different kinds of cure claims. Despite too-good-to-be-true promises, there is no known effective treatment for frozen shoulder [NHS] — nothing that actually prevents the capsule from adhering, nothing that can free it up without doing more harm than good.
However, range of motion can probably be preserved to some degree by early use-it-or-lose-it interventions. And the pain can be helped (which in turns helps with the “using”). pain can almost always be helped.“Despite over a hundred years of treating this condition the definition, diagnosis, pathology & most efficacious treatments are still largely unclear.”
A few scientific reviews of frozen shoulder treatments have been published, but they suffer badly from the “garbage in, garbage out” problem: there’s not enough good quality research to review. And so there’s a strong theme in their conclusions: no one really knows what works yet, and most of the better evidence we do have is either unimpressive or outright disappointing. “Despite over a hundred years of treating this condition the definition, diagnosis, pathology and most efficacious treatments are still largely unclear.”20
In a typical example, Maund et al reviewed 31 studies in 2012, “many” of which were “at high risk of bias,” concluding after great effort that were is “limited clinical evidence on the effectiveness of treatments for primary frozen shoulder.”21 The authors of a big 2014 review sounded particularly underwhelmed: they concluded that that hardly anything seems to work, and nothing works for long.22 Out of 32 trials, not one “compared a combination of manual therapy and exercise versus placebo or no intervention” — in other words, a total lack of evidence on what is probably the most important treatment topic.
Favejee et al is one the more optimistic reviews, somehow finding — in the same literature Maund et al and Page et al looked at! — some moderate to strong evidence for the short term benefits of some treatments.23 But emphasis on the short term: “most of the included studies reported short-term results” only.
This unhelpful mess of mediocre evidence and “more study needed” conclusions is a good demonstration how musculoskeletal medicine is still surprisingly primitive.24 Frozen shoulder seems worthy of considerably more and better research attention than it has gotten!
If you believe you are in the early stages of frozen shoulder, immediately begin a campaign of mobilizations: gently, thoroughly use as much of your range of motion as you can without excessive discomfort.25 This a nice collection of exercises for the shoulder, with good illustrations: “7 stretching & strengthening exercises for a frozen shoulder.” [Harvard Health]
Give your range of motion a little helping hand, too. For instance, use a wall to support the weight of your arm while “walking” up the wall with your fingers. Such tactics are a good way to take safe baby steps into the outer limits of your comfortable range.
Emphasize any activity you enjoy that requires extensive shoulder range of motion. If you have none, consider taking one up: tennis, for instance. You may find it difficult, but making movement challenges fun is a really valuable rehab principle.
What if you can’t move it? Then imagine moving it. Seriously! A very large component of movement is neurological. When we lose range of motion, it’s both a physical and a neurological loss. If you can’t preserve the physical, keep working on the neurological!
In my experience manual therapy and traditional physiotherapy methods for frozen shoulder do very, very little. I have tried them all, pulling and pressing people with painful frozen shoulders, here, there, and everywhere, all with little effect, and all too no avail. However, there is a “different” method for treating frozen shoulders that I have been using more and more over the years…
Frozen shoulder? Let it go, Let it go…., Meakins (TheSportsPhysio.wordpress.com)
Physiotherapist Adam Meakins has a novel idea idea about how to treat frozen shoulder. Although it’s not clearly evidence based, it is an educated guess from a particularly good guesser about shoulders, with some strong theoretical foundations.26 It involves progressively challenging range of motion, putting it firmly in the “use it or lose it” category of treatment approaches. Adam put’s another spin on that, teaching his patients to use it specifically with eccentric contractions: that is, contracting muscles while they lengthen.
Why use “contraction” here at all, if frozen shoulder isn’t a muscle problem? The complex rotator cuff muscle group is seamlessly blended with the joint capsule, and to stimulate one is to stimulate the other… and eccentric contraction is an interesting stimulus, well known to have unusual and potentially rehabilitative effects on connective tissue. It is often used as a tendonitis treatment.
Another consideration is the on-going debate about how much of a role muscle tension may play in frozen shoulder, either greatly complicating or actually mimicking an adhered capsule: functional freezing. To the extent that the freezing is functional, then it does make a lot of sense to work with the shoulder muscles.
So what exactly do you do? You slowly lower a small weight into a manageable stretch into your most limited movements. You make it as easy as possible at first, and you up the ante every few days. You tolerate a little discomfort, but not too much. You don’t want to push hard through pain, but you do want to strive to ease through any muscle tension holding you back: “let it go,” as Adam puts it…referencing the song, of course. 😃 And you do all of this with the confidence that your shoulder tissues are probably not as raunchy as they feel.
See his article for full details with pictures: Frozen shoulder? Let it go, Let it go….
Some pain relief may be possible with the use of a topical analgesic like Voltaren®. The medication may not soak in deeply enough for a significant effect, but it’s worth trying — and topical delivery is much better than dosing your entire system with edible pain-killers, which have a dizzying array of side effects, some of them serious.27
Corticosteroids are potent anti-inflammatory agents. Wherever pain is caused by inflammation, corticosteroid injections are likely to produce substantial temporary pain relief — at the cost of an invasive procedures with some risks. In the case of frozen shoulder, it’s very clear that these injections function as a kind of super pain-killer — they definitely reduce pain.28 However, it’s equally clear that the benefits don’t last, and the freezing of the joint proceeds. The main use of corticosteroid injections for frozen shoulder is probably to facilitate ROM-maintaining exercise.
An anti-inflammatory diet — also known as a healthy diet, with a few specific features — might reduce the severity and duration of frozen shoulder.
As explained above, frozen shoulder is strongly associated with metabolic syndrome, which in turn is strongly associated with poor fitness, obesity, aging, a typical modern junky diet, genetics (of course), and maybe chronic stress, anxiety, and fatigue as well.29 One of the main biological consequences of metabolic syndrome is a lot of subtle inflammation, which can to all kinds of trouble in time, especially cardiovascular disease … and even frozen shoulders. An “anti-inflammatory” diet is not magic: it’s just eating to minimize metabolic syndrome and its consequences, the kind of diet that practically everyone everywhere should be eating anyway.
There is no evidence at all — zip, zero, zilch — that eating this way will specifically help a condition like frozen shoulder. By the time your shoulder is freezing, it could be way too late for your diet to make any difference. Or maybe it’s not! Maybe this is one of the reasons why some people take much longer to recover than others. No one knows, but all of this is very reasonable speculation, and it’s well worth trying, for obvious reasons: it’s good for you otherwise, even if it has no effect on frozen shoulder.
There’s a more extreme dietary option to consider…
Diets that force you to mainly burn fat for energy, instead of carbohydrates — a ketogenic diet [AuthorityNutrition.com], like the infamous Atkins diet — have some well-established benefitsmay be anti-inflammatory and de-sensitizing.30
This is a completely experimental treatment. However, like an anti-inflammatory diet (AKA “healthy”), it has a non-crazy rationale, and it’s safe and inexpensive to dabble in. As long as you don’t get extreme, the worst case scenario is putting up with a fussy and unpleasant change in eating habits. Nevertheless, I am obliged to suggest that you run this by your physician and/or a nutritionist.
Fasting is another option, but it might work (and perhaps simply because it includes a ketogensis), but it’s harder and less safe — so I’m less inclined to actually recommend it. But if you are keen on the idea fasting for whatever reason, it’s another possibility to consider.
I have a separate article devoted to this topic which suggests some other possible strategies for reducing systemic inflammation. To the extent that any of them work at all (quite unknown), they would likely support recovery from frozen shoulder.
Although the adhesions in the shoulder joint capsule cannot be broken by massage — not safely at any rate — it undoubtedly is possible for massage to relieve some of the discomfort that usually develops in the area. Many patients crave massage therapy for this condition. In the best case scenario, a surprising amount of the discomfort of frozen shoulder is just a symptom that can be treated by massage. At least a little, at least temporarily. And we should never knock a little symptom relief.
But massage might have more profound relevance to frozen shoulder. As discussed earlier in the tutorial, some shoulders may be more functionally than literally frozen, and this is more likely in chronic cases. If true, then massage may could theoretically treat the root of the problem. If it works, here’s how it might work…
The stimulation of massage, probably combined with slow passive movements, might encourage and reassure the nervous system that it’s okay to move the shoulder again, such that it can reconsider the shoulder “lockdown” policy it may be entrenched in. Any reduction of neurological inhibition would create an opportunity for more movement, but that window opportunity might be narrow, especially at first. If there’s any increase in range of motion following massage, that’s a great sign that should be exploited by gently exploring the improved ROM as much as possible for as long as it lasts.
The massage treatment itself should be low key as well: this is all about convincing the nervous system that there’s no danger. Excessively intense massage could actually backfire.
A major disadvantage of this approach is that it could be slow and therefore expensive. How good is massage at facilitating the resolution of neurological inhibition? Can it do it at all? No one knows. It’s probably not worth pursuing if there’s no noticable improvement within roughly 6 half-hour massages of the shoulder and area (and even that’s getting to be quite a costly experiment). However, note that there are also other, less expensive ways to “reassure” nervous systems about shoulders.
If a frozen shoulder is functionally frozen, muscle “knots” or trigger points may be one of the causes of the tightness. Rubbing trigger points seems to ease them! No one knows how well this works, or even if it works at all, but it is a safe treatment to experiment with, often pleasant if done well, even cheap if you learn to do some yourself, and it’s not hard to dabble in. Trigger point treatment is covered in great detail elsewhere on this site. I have a basic trigger point self-treatment guide, and a huge trigger point tutorial for the toughest cases, for both patients and professionals.
But basically… just rub the sore spots. Somehow I’ve written about a quarter million words about “just rub the sore spots.” 😮
Although massaging nearly any muscle tissue in the area may be useful, there is one that’s worth some special consideration: Perfect Spot No. 14, The Most Predictable Unsuspected Cause of Shoulder Pain.
For what it’s worth, many massage therapists do claim to have cured cases of frozen shoulder.31 It’s not hard to see why. I have my own highly relevant treatment story — the one about my uncle-in-law, near the beginning of that page — worth a detour if the massage angle interests you.
Warning! Please do not allow a health care professional to attempt to forcefully increase your range of motion! This can cause extreme pain from the rupture of adhesions, which quickly get sticky again. Also, resistance from muscles protecting the joint can be so substantial that it is impossible to apply force effectively to the actual joint capsule, and muscles may tear instead of adhesions. There is no proven benefit to this therapeutic approach, and substantial risk.
Doing the same thing under anaesthesia, although hardly safe, is much more promising…
The shoulder can be paralyzed by injecting anaesthetic into a thick web of nerves emerging from neck (brachial plexus), which greatly reduces muscular tone (but probably doesn’t actually eliminate it.32) A doctor can then apply force much more directly and precisely to the adhesions in the joint capsule, without fighting through much muscular resistance.Does it work? If only we knew! This is a pseudo-surgery, and like many surgeries, it is understudied.
Unfortunately, this is only an option for desperate patients, because there are substantial risks to this procedure.33 Some people go straight from the freezer to the frying pan of a serious manipulation injury or — ironically — permanent hypermobility with recurrent disclocations. There’s also a substantial rehab process after the surgery — things are a bit wonky afterwards, even if it goes well, and it takes time. (And it’s not an option at all for patients with past dislocations, fractures, or bone loss.)
Does it work? If only we knew! This is a pseudo-surgery, and like many surgeries,34 it is understudied and based more on seeming to make sense than any hard evidence. There are a few mediocre scientific tests, but there’s just not enough good quality data yet. It’s important to bear in mind that many orthopedic surgeries have been proven ineffective, even though they too seemed liked good ideas.35 This one might actually work, or it might not. It’s just a gamble.
Another way to force the issue, and likely safer that MUA, is arthroscopic or “keyhole” surgery. The goal is exactly the same, but the method is much less brutish: instead of tactical wrenching of the joint until the adhesions tear, a surgeon goes in with a tiny camera through a tiny incision and cuts things free.
Although we don’t have good data on whether manipulation or cutting actually work, we do know that each one is roughly as good as the other.36 All other things being equal, I’d prefer not to get wrenched around.
When you blow up a balloon, it is often stuck to itself, and slightly adhered layers of rubber peel away from each other as you force them apart with air pressure. The same principle is used in hydrodilation injections, only the ballon is the shoulder joint capsule, and it’s inflated with saline solution (maybe with some steroids as well, to help with the inevitable spike in inflammation). Like blowing up a ballon, the pressure is supposed to inflate the capsule.
In no other way is the shoulder joint capsule like a balloon, and simplistic analogies like this are often misleading in medicine. Adam Meakins calls distension “highly dubious.” It has barely been tested, but the conclusion of a 2008 scientific review of just five studies makes it sound almost promising:37
There is "silver" level evidence that arthrographic distension with saline and steroid provides short-term benefits in pain, range of movement and function in adhesive capsulitis. It is uncertain whether this is better than alternative interventions.
Still, “uncertain” is an understatement there!
Fortunately, there is some more encouraging evidence from 2013 trial, only the second one ever to produce long term results (and it also included diabetic patients).38 It’s far from proof, but it’s better than nothing.
Despite that evidence, this procedure is based mostly on “common sense” of the doctorly sort: it seems like a good idea. Maybe it helps and maybe it doesn’t. As with arthroscopic release, I’d certainly try this before manipulation under anaesthesia, for the safety. But I certainly wouldn’t bet on the outcome.
On this website, I often write about conditions I have some personal experience with. In this case, it’s not my own experience, but my wife’s: a rip-roaring case in the aftermath of a very serious car accident, adding injury to injury.
She says the shoulder was the worst pain she had in the entire recovery experience (and she broke several bones, including her skull, spine and pelvis). We have a rather vivid memory of walking down the street together one day, near the peak of the problem, and she tripped a little and reflexively tried to stabilize herself with the bad shoulder. WOW. Never seen her react like that to anything, before or since!
But there’s a peculiar wrinkle in her story: she actually already had a full-blown case of frozen shoulder when the accident happened. It cleared up completely for several months during the the initial stages of rehab. And then it returned! It’s like the accident hit the “pause” button. What can we make of this? It’s hard to interpret for sure, but I think one possibility is that it means that the first phase of her frozen shoulder was functional: not an adhesive capsulitis, but a neurological ban on movement which was lifted when the accident changed her “priorities,” and then re-imposed when her body started to recover from the severe injuries.
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.
Why Does Pain Hurt? — The inflammation of frozen shoulder is exasperatingly mysterious. This article explains how inflammation can be “glitchy” — an interesting perpsective that might help make sense of frozen shoulder.
Into the Fire — The story of a difficult shoulder rehab. Although not a case of adhesive capsulitis, there’s lots of relevant detail about how any shoulder pain can get stubborn.
Twenty-one updates have been logged for this article since publication (May 2nd, 2016). All PainScience.com updates are logged to show a long term commitment to quality, accuracy, and currency. more
When’s the last time you read a blog post and found a list of many changes made to that page since publication? Like good footnotes, this sets PainScience.com apart from other health websites and blogs. Although footnotes are more useful, the update logs are important. They are “fine print,” but more meaningful than most of the comments that most Internet pages waste pixels on.
I log any change to articles that might be of interest to a keen reader. Complete update logging of all noteworthy improvements to all articles 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.
— Science update: Littlewood et al now provides some more substantive support for the theory of functional freezing and related rehabilitation methods.
— Minor updates. Polishing of the massage section. Added an interesting clarification about my wife’s strange experience with frozen shoulder. Several other miscellaneous, minor improvements.
— Significant expansion. Added much more information about trying to treat frozen shoulder with massage therapy.
— Minor science update. Brief discussion of rotator cuff abnormalities in asymptomatic people.
— Minor upgrades. Editing of “stiff but not frozen” topic. Made a diagram of the hypothetical relationship between adhesive and functional freezing.
— Minor upgrades: some revisions to the discussion of treating systemic inflammation with diet, and added an important link out to a new article on that topic.
— Major upgrade: added a new section, “Stiff but not frozen: the case for tightness,” and started beefing up the massage section as well.
— Added a couple footnotes to the introduction about prognosis and worst case scenarios. Added a footnote about hyperthydroidism as a risk factor. And there’s enough footnotes on this page now (31) that I added a footnote demo to the intro.
— Added “The Meakins Method” treatment suggestion — eccentric loading of the rotator cuff muscles. Added interesting new evidence about arthrographic distension.
— Added more general evidence about treatment efficacy. Added a new section about joint capsule inflating.
— Several clarifications about diagnosis, and some new citations and expert quotes. Added a paragraph about x-rays.
— Added more information about range of motion and reliability of assessment of ROM. Added new sections on manipulation under anaesthesia and arthroscopic capsular release.
— Added footnote about other frozen joints, like frozen hips. Added a little about smoking as a risk factor. Expaned the introduction to treatments and added several new citations.
— Added section about anti-inflammatory (AKA “healthy”) diet. Added short paragraph about fasting. Added a case study. Miscellaneous editing. Article is now substantive enough for removal of “half-baked” disclaimer, and a title change from frozen shoulder “primer” to “guide.”
— Added full description of symptoms, edited diagnostic section, and added a picture showing where to find the coracoid process.
— Added first draft of differential diagnosis section.
— Added diagnosis section, starting with a clear pathognomonic sign, coracoid process sensitivity.
— Added links to several authoritative/useful sources. General editing to clean up and clarify recent additions. More descriptive headings. Started adding related reading recommendations.
— Added recommendation to try a ketogenic diet.
— Added basic information about corticosteroid injections; discussion of Pietrzak’s evolutionary perspective; more movement recommendations.
— Added “Nature of the beast” section, cited Pietrzak, plus a few other miscellaneous details.
Ketogenic diets are well-known to treat epilepsy in some children. The biology of ketogenesis may also have an effect on some kinds of inflammation and pain, especially neuropathic pain. Although highly speculative, there are some reasons to think it might work, and some indirect (animal) evidence that it does. Like seizures, some kinds of pain may involve overexcited neurons, and can be treated with anticonvulsant drugs. Ketone metabolism “produces fewer reactive oxygen species,” a contributor to inflammation; and it produces adenosine signalling, which is a suspected pain-killer in other contexts (exercise, possibly acupuncture).BACK TO TEXT