Most joint stiffness is ordinary, but two causes cannot wait

Two people wake up stiff on the same morning. One is 58, climbs out of bed on creaky knees and is moving easily by the time the coffee is made. The other is 72, and over the past week has found it hard to lift both arms high enough to brush her hair, with her shoulders and hips aching until late morning.

The first pattern is common and usually ordinary. The second is the kind a clinician would check for polymyalgia rheumatica, an inflammatory condition of people over 50 that, in a minority, travels with an artery disease that can take away sight.

Stiffness has a short list of everyday causes and two that cannot wait. Here is how they differ, what the evidence says about frozen shoulders and the weather, and which combinations of symptoms call for a prompt or emergency visit.

Stiffness after rest: the osteoarthritis pattern

The most familiar stiffness belongs to osteoarthritis. The National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS) says it usually lasts less than 30 minutes, whether it shows up first thing in the morning or after a stretch of sitting. The pain tends to come with using the joint and may ease with rest. The Centers for Disease Control and Prevention (CDC) lists stiffness after resting a joint among its symptoms.

In practice, it is the knee that feels set in place after a two-hour movie and loosens within a few dozen steps up the aisle. That short warm-up is the signature. What helps with osteoarthritis itself, and what doesn’t, is covered in the arthritis article.

Inflammatory arthritis keeps a different clock. NIAMS describes rheumatoid arthritis stiffness as lasting longer than 30 minutes. The American College of Rheumatology (ACR) patient page puts it at more than an hour. Classification criteria for polymyalgia rheumatica, discussed below, use more than 45 minutes. These come from documents written for different purposes, so no single number is the rule. Our article on inflammation shows how little morning stiffness alone shifted the odds in one large analysis of back pain.

What helps a clinician is a measured pattern written down over a couple of weeks: how many minutes, which joints, and how many days in a row.

Frozen shoulder, and the two-year myth

Frozen shoulder, which doctors call adhesive capsulitis, is a painful, gradual loss of shoulder motion. The American Academy of Orthopaedic Surgeons (AAOS) says it most often affects people between 40 and 60, more often women. It is linked to diabetes, thyroid disease, Parkinson disease and heart disease, and it can follow a period of keeping the arm still after surgery or a fracture.

Diabetes stands out. A 2016 meta-analysis of 18 studies found people with diabetes were five times as likely as others to have frozen shoulder, which affected 13.4% of them. Run the other way, 30% of people with frozen shoulder had diabetes, and the authors suggested considering a diabetes check in anyone who arrives with one. The AAOS adds that people with diabetes tend to have more stiffness, for longer.

Three stages, but no guarantee

The standard story describes three stages. The AAOS gives a freezing stage of about 6 weeks to 9 months as pain builds and motion is lost, a frozen stage of 4 to 6 months, and a thawing stage of 6 months to 2 years. It notes full recovery can take up to three years.

The popular shorthand, that frozen shoulder always thaws by itself in about two years, goes further than the evidence. A systematic review by Columbia University researchers, published in the journal Physiotherapy in 2017, pulled together the seven studies that followed people who had no treatment. Low-quality evidence showed some improvement in motion over one to four years, but not complete recovery. Moderate-quality evidence from three trials showed most improvement came early, not in a late thaw. The authors concluded that “the theory of recovery phases leading to complete resolution without treatment for frozen shoulder is unfounded.”

The AAOS lists physical therapy as the main treatment, alongside anti-inflammatory medicine and steroid injections, with hydrodilatation (stretching the joint capsule with injected fluid), manipulation under anesthesia or arthroscopic release for shoulders that do not respond. It describes recurrence as uncommon. There is less guidance than you might expect: a review published in late 2024 found only two English-language practice guidelines for frozen shoulder and called for an up-to-date one.

Which of those options fits, and whether a stiffening shoulder warrants a blood sugar check, are questions for the clinician examining it.

Two causes that get mislabeled: loose joints and Parkinson disease

When the problem is too much movement

Some people describe their joints as unreliable rather than stiff. Joint hypermobility means joints that move beyond the usual range. It is the hallmark of the hypermobile type of Ehlers-Danlos syndrome (EDS), a group of inherited connective tissue disorders.

MedlinePlus Genetics, from the National Library of Medicine, says the 2017 classification recognizes 13 types of EDS. The hypermobile and classical types are the most common, and the hypermobile type may affect 1 in 5,000 to 1 in 20,000 people. In that type, loose joints can be unstable, dislocate and cause chronic pain. Its cause is unknown in most people.

That 2017 classification, from an international consortium writing in the American Journal of Medical Genetics, requires a genetic finding to confirm every type except the hypermobile one. For that type it revised the clinical criteria to separate it from other joint hypermobility disorders. Being double-jointed, in other words, is neither proof of EDS nor proof that nothing is wrong. Sorting that out is a job for a clinician who knows the criteria.

When stiffness comes from the brain

Rigidity is one of four main movement symptoms of Parkinson disease, according to the National Institute of Neurological Disorders and Stroke (NINDS), whose page was last reviewed in July 2026. The muscles stay tense and tight, which can feel like aching and stiffness. Symptoms often begin on one side of the body, and the average age of onset is the early to mid-60s. Depression or anxiety can appear before movement problems do.

There is no single test that confirms Parkinson disease, NINDS says. New stiffness or slowness on one side, especially with a tremor, is a reason to ask a primary care clinician whether a neurological evaluation makes sense. The AAOS also lists Parkinson disease among the conditions linked to frozen shoulder.

Does the weather really make joints ache?

About three-quarters of people with arthritis believe the weather affects their pain, according to background figures cited by UK researchers. Two large studies tested the idea in different ways, and they fit together better than headlines suggest.

The first, published in The BMJ in 2017 by a Harvard-led team, looked at 11.7 million outpatient visits by 1.55 million Medicare patients aged 65 and older from 2008 to 2012. If rain made joints ache, visits for joint or back pain should rise on rainy days. They did not. After adjustment, 6.35% of rainy-day visits involved joint or back pain against 6.39% on dry days, a difference in the wrong direction and too small to matter. Rheumatoid arthritis patients showed no link either.

The second, published in 2019 in NPJ Digital Medicine, followed 2,658 people in the UK who logged symptoms daily on a smartphone app for up to 15 months, most of them with arthritis. Rainfall again showed no link, and neither did temperature. But higher humidity, lower air pressure and stronger wind were each tied to more days with a jump in pain. The effects were modest: the worst combination of weather raised the odds of a pain flare by just over 20% compared with an average day. Low mood was linked to far larger odds.

So rain is probably not the culprit, and humidity and pressure may play a small part. Two cautions apply. Both studies measured pain, not stiffness; the app study collected stiffness ratings but reported pain. And the UK participants chose to join a weather study, which could tilt the sample.

Polymyalgia rheumatica: the over-50 stiffness that comes on fast

Polymyalgia rheumatica (PMR) is an inflammatory condition that causes aching and stiffness, mainly in people over 50. The ACR’s patient page, updated in February 2025, describes it in the upper arms, neck, lower back and thighs, usually on both sides. It can begin quickly, even overnight. It is worst in the morning and tends to ease as the day goes on.

It is not rare. A Mayo Clinic study of Olmsted County, Minnesota, counted 377 new cases from 2000 to 2014, an annual rate of 63.9 per 100,000 people aged 50 and older. The average age at onset was 74, and 64% were women. One reassuring finding: people with PMR in that county did not die sooner than the general population.

Two points on the ACR page correct the assumption that this is ordinary aging pain: common anti-inflammatory drugs such as ibuprofen are not effective for PMR, while low-dose steroids usually relieve the symptoms quickly. Treatment is commonly tapered over about a year, though some people need two to three years, and the FDA has approved a biologic drug for it. The trade-off is real. The ACR lists the side effects that can come with longer steroid courses, including bone loss, mood swings, weight gain, poor sleep, muscle weakness, cataracts and easy bruising, while noting most are temporary and manageable. Balancing relief against those effects, and every dosing and tapering decision, belongs to the treating clinician.

A clinical diagnosis

No single test settles it. The 2012 criteria from a joint project of European rheumatologists and the ACR score features such as aching in both shoulders, morning stiffness over 45 minutes, hip pain and negative blood tests for rheumatoid arthritis. They were built to classify patients, not to diagnose individuals, and the authors said so in one plain line: “These criteria are not meant for diagnostic purposes.” International recommendations on imaging, published in October 2026, likewise call PMR primarily a clinical diagnosis, with scans most useful when the picture is unclear. The 2025 European recommendations described below say that for most people with suspected PMR, treatment can wait until the diagnosis is confirmed, which is exactly what they do not say about GCA.

Giant cell arteritis: the vision emergency

Giant cell arteritis (GCA) is inflammation of arteries, including those at the temples, that can reach the blood supply of the eye. The ACR’s patient page says it usually strikes after 50 and more often in women. Its most common symptom is a new headache, usually around the temples. Others include jaw pain when chewing, fatigue, weight loss, a flu-like feeling and changes in vision.

The two conditions are linked. According to the ACR, about 5% to 15% of people with PMR are later diagnosed with GCA, and about half of people with GCA have PMR symptoms. A 2022 meta-analysis found hidden artery inflammation in 23% of people with new PMR and no head symptoms when they were screened with biopsy or imaging. Those figures measure different things, diagnosed disease later versus silent inflammation found by scanning, so they do not conflict. The 2026 imaging recommendations do not support routinely screening PMR patients for it.

Vision is what makes GCA urgent. The ACR warns that permanent vision loss can happen suddenly, and says treatment should start immediately after diagnosis. In a Mayo Clinic study of 245 GCA cases over 60 years, 8.2% of patients lost vision permanently, and eyesight at the end was no better than when they first came in. One in five of those who lost vision had none of the general symptoms, such as fatigue or fever, that might have raised suspicion.

There is no simple blood test for it. The ACR notes that the sedimentation rate, a common inflammation test, cannot prove GCA by itself. Confirmation usually comes from a biopsy of the temporal artery, and in some cases from an ultrasound of it.

Recommendations from the European Alliance of Associations for Rheumatology (EULAR), dated 2025 and published in July 2026, say anyone with suspected GCA should get specialist assessment within 24 hours, and that when suspicion is strong, steroid treatment should start without waiting for confirmatory test results. The US guideline from the ACR and the Vasculitis Foundation, published in 2021, made nearly all of its recommendations conditional because the evidence was of low quality. The ACR also asks people with PMR, whether it is active or not, to report any new headache, jaw pain or vision change.

Any sudden change in vision or loss of vision in someone over 50 is an emergency. Call 911 or go to an emergency department right away, and mention any new headache or jaw pain.

What to note about your stiffness, and when to get care fast

Before an appointment, a few minutes of note-taking makes the visit more useful:

• Where. Which joints, and whether one side or both.
• When and how long. The time of day it is worst, and minutes from getting up until it eases. Time it.
• How it started. Over months, or over days.
• What changes it. Whether moving eases it or makes it worse.
• What comes with it. Swelling, warmth, fever, weight loss, fatigue, headache, jaw pain, vision changes.
• Your background. Diabetes, thyroid disease, recent surgery or a stretch of keeping a limb still.

Then sort the pattern:

• Emergency, call 911: sudden vision change or loss in anyone over 50.
• Same day: a new headache, especially at the temples, or jaw pain when chewing in someone over 50, even with normal vision. This is also true for anyone already diagnosed with PMR.
• Prompt appointment: new aching and stiffness in both shoulders or both hips that came on over days in someone over 50; stiffness lasting well past 30 minutes each morning with swollen joints for more than six weeks; a shoulder that keeps losing motion; or one-sided stiffness with slowness or tremor.

The takeaway

Stiffness that eases within half an hour of getting moving is the common, ordinary pattern. New stiffness in both shoulders or hips after 50 is a reason to see a clinician soon, and a change in vision, whether it comes with that stiffness or with a new headache or jaw pain, is an emergency. The single most useful thing you can bring to an appointment is a timed, written record of when the stiffness starts and how long it lasts.

Sources

1. National Institute of Arthritis and Musculoskeletal and Skin Diseases. “Osteoarthritis.” niams.nih.gov
2. Centers for Disease Control and Prevention. “Osteoarthritis.” cdc.gov
3. National Institute of Arthritis and Musculoskeletal and Skin Diseases. “Rheumatoid Arthritis.” niams.nih.gov
4. American College of Rheumatology. “Rheumatoid Arthritis (patient page, updated February 2025).” rheumatology.org
5. American Academy of Orthopaedic Surgeons (OrthoInfo). “Frozen Shoulder.” orthoinfo.org
6. Muscles, Ligaments and Tendons Journal. “Zreik NH, Malik RA, Charalambous CP. "Adhesive capsulitis of the shoulder and diabetes: a meta-analysis of prevalence." Muscles Ligaments Tendons J, 2016;6(1):26-34. PubMed. DOI: 10.11138/mltj/2016.6.1.026.” pubmed.ncbi.nlm.nih.gov
7. Physiotherapy. “Wong CK, Levine WN, Deo K, et al. "Natural history of frozen shoulder: fact or fiction? A systematic review." Physiotherapy, 2017;103(1):40-47. PubMed. DOI: 10.1016/j.physio.2016.05.009.” pubmed.ncbi.nlm.nih.gov
8. Physiotherapy Theory and Practice. “Salamh P, Ross M, Cornett M, et al. "Quality of clinical practice guidelines for frozen shoulder: a systematic review." Physiother Theory Pract, 2025;41(7):1495-1502 (online November 2024). PubMed. DOI: 10.1080/09593985.2024.2421881.” pubmed.ncbi.nlm.nih.gov
9. MedlinePlus Genetics, National Library of Medicine. “Ehlers-Danlos syndrome (last updated July 29, 2022).” medlineplus.gov
10. American Journal of Medical Genetics Part C. “Malfait F, Francomano C, Byers P, et al. "The 2017 international classification of the Ehlers-Danlos syndromes." Am J Med Genet C Semin Med Genet, 2017;175(1):8-26. PubMed. DOI: 10.1002/ajmg.c.31552.” pubmed.ncbi.nlm.nih.gov
11. National Institute of Neurological Disorders and Stroke. “Parkinson's Disease (last reviewed July 23, 2026).” ninds.nih.gov
12. The BMJ. “Jena AB, Olenski AR, Molitor D, Miller N. "Association between rainfall and diagnoses of joint or back pain: retrospective claims analysis." BMJ, 2017;359:j5326. PubMed. DOI: 10.1136/bmj.j5326.” pubmed.ncbi.nlm.nih.gov
13. NPJ Digital Medicine. “Dixon WG, Beukenhorst AL, Yimer BB, et al. "How the weather affects the pain of citizen scientists using a smartphone app." NPJ Digit Med, 2019;2:105. PubMed. DOI: 10.1038/s41746-019-0180-3.” pubmed.ncbi.nlm.nih.gov
14. American College of Rheumatology. “Polymyalgia Rheumatica (patient page, updated February 2025).” rheumatology.org
15. Arthritis Care & Research. “Raheel S, Shbeeb I, Crowson CS, Matteson EL. "Epidemiology of Polymyalgia Rheumatica 2000-2014 and Examination of Incidence and Survival Trends Over 45 Years: A Population-Based Study." Arthritis Care Res (Hoboken), 2017;69(8):1282-1285. PubMed. DOI: 10.1002/acr.23132.” pubmed.ncbi.nlm.nih.gov
16. Arthritis & Rheumatism. “Dasgupta B, Cimmino MA, Kremers HM, et al. "2012 Provisional classification criteria for polymyalgia rheumatica: a European League Against Rheumatism/American College of Rheumatology collaborative initiative." Arthritis Rheum, 2012;64(4):943-954. PubMed. DOI: 10.1002/art.34356.” pubmed.ncbi.nlm.nih.gov
17. Annals of the Rheumatic Diseases. “Bond M, Hysa E, Konzett V, et al. "International recommendations for the use of imaging in the diagnosis and assessment of polymyalgia rheumatica." Ann Rheum Dis, 2026 (online October 27, 2026). PubMed. DOI: 10.1016/j.ard.2026.09.020.” pubmed.ncbi.nlm.nih.gov
18. American College of Rheumatology. “Giant Cell Arteritis (patient page, updated February 2025).” rheumatology.org
19. Seminars in Arthritis and Rheumatism. “Hemmig AK, Gozzoli D, Werlen L, et al. "Subclinical giant cell arteritis in new onset polymyalgia rheumatica: A systematic review and meta-analysis of individual patient data." Semin Arthritis Rheum, 2022;55:152017. PubMed. DOI: 10.1016/j.semarthrit.2022.152017.” pubmed.ncbi.nlm.nih.gov
20. Ophthalmology. “Chen JJ, Leavitt JA, Fang C, et al. "Evaluating the Incidence of Arteritic Ischemic Optic Neuropathy and Other Causes of Vision Loss from Giant Cell Arteritis." Ophthalmology, 2016;123(9):1999-2003. PubMed. DOI: 10.1016/j.ophtha.2016.05.008.” pubmed.ncbi.nlm.nih.gov
21. Annals of the Rheumatic Diseases. “Mukhtyar CB, Nikiphorou E, Bartoletti A, et al. "2025 EULAR recommendations for the management of polymyalgia rheumatica and primary large vessel vasculitis." Ann Rheum Dis, 2026 (online July 21, 2026). PubMed. DOI: 10.1016/j.ard.2026.06.009.” pubmed.ncbi.nlm.nih.gov
22. Arthritis & Rheumatology. “Maz M, Chung SA, Abril A, et al. "2021 American College of Rheumatology/Vasculitis Foundation Guideline for the Management of Giant Cell Arteritis and Takayasu Arteritis." Arthritis Rheumatol, 2021;73(8):1349-1365. PubMed. DOI: 10.1002/art.41774.” pubmed.ncbi.nlm.nih.gov