Movement & fitness

Osteoarthritis: joint changes, pain, movement, and care

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Osteoarthritis involves changes across a joint, including cartilage, bone, the joint lining and surrounding tissues. It commonly affects hands, hips and knees. Calling it only “wear and tear” misses this whole-joint biology and can wrongly imply that ordinary movement is inevitably damaging.[1]

Pain, stiffness, and diagnosis

Pain with joint use, reduced movement, swelling and brief stiffness after rest are common. Symptoms and progression vary; osteoarthritis can occur after injury and is not exclusive to older age. Having joint changes does not settle how much pain or disability someone experiences.[1]

There is no single diagnostic test. History and examination establish the clinical picture. X-rays show features such as narrowing joint space or bone changes; early damage may not appear. MRI can answer selected soft-tissue questions. Blood tests or joint-fluid sampling may help investigate another cause, including gout or infection.[2]

NICE advises against routine imaging to diagnose typical osteoarthritis or guide nonsurgical follow-up. A scan is useful when it answers a relevant question, not simply because more images are available.[4]

What the exercise evidence does and does not establish

The 2024 Cochrane review included 139 trials and 12,468 adults with knee osteoarthritis. Programs lasted 2–104 weeks. Exercise generally improved short-term pain or function, but results depended on whether the comparison was attention/placebo, usual care or another treatment. Most studies could not blind participants, and the review rated evidence low to moderate certainty.[3]

Compared with attention control or placebo, physical function improved by a mean 11.27 points on a 0–100 scale (95% CI 7.64–15.09). The review’s importance threshold was 13 points, so the interval included both smaller and clinically important effects. This is evidence for an average functional benefit with uncertainty about its size, not proof that movement cannot help.[3]

NIAMS describes strengthening, range-of-motion work, low-impact aerobic activity and water-based exercise as possible components. A feasible program depends on ability, affected joints and response. Physical and occupational therapists can help adapt activity and everyday tasks.[2]

Medicines, supports, injections, and surgery

The ACR/Arthritis Foundation guideline recommends several options for specific joints, including topical or oral NSAIDs and selected steroid injections. Recommendations are not identical for hand, hip and knee disease. Shared decisions consider pain, function, other conditions, preferences and medicine risks; no one option is a universal first choice.[5]

NIAMS describes medicines for symptoms, braces or assistive devices, and surgery when appropriate, including joint replacement. The purpose is improving symptoms and function. A symptom-relieving treatment should not be presented as proof that underlying joint changes have been reversed.[2]

A fast intervention and a better one-year outcome can differ

A 2020 randomized trial compared physical therapy with a glucocorticoid injection for knee osteoarthritis. At one year, physical therapy produced less pain and functional disability. This does not say that an injection never gives short-term relief, or apply automatically to every joint. It illustrates why duration, comparator and function should stay attached to a treatment claim.[6]

A walking aid needs to fit the person and task

A stick, crutch and frame offer different support. South Tees’ physiotherapy service describes assessing the person, measuring the aid and teaching its use. Grip design can matter when hands or wrists are painful. Ask which aid and height suit the actual walking problem rather than borrowing equipment solely because someone else found it helpful.[7]

For a knee brace, Gateshead’s leaflet advises discussing the choice with a doctor or physiotherapist. A brace is an addition to other appropriate care, not a stand-alone replacement for it. A support marketed for one joint or problem does not settle another joint’s needs.[8]

A surgical assessment considers daily life and the whole evaluation

The American Academy of Orthopaedic Surgeons (AAOS) describes knee-replacement decisions as shared discussions of pain, function, health, examination and X-rays, alongside other treatments. Difficulty sleeping, walking or getting out of a chair can matter as much as naming an image abnormality. Discuss what nonsurgical care has helped, what remains difficult, realistic benefits, recovery work and possible complications. An assessment is an opportunity to discuss options; it is not an instruction that every abnormal X-ray requires surgery.[9]

Evidence & uncertainty

Exercise and other care can improve symptoms and function, but they are not proven ways to restore every affected joint to its original state. Effects differ with the intervention, comparator and outcome. In knee-exercise trials, average benefits were of uncertain clinical importance despite statistical improvement.[3]

Selected-source overview · Independent review pending

Published questions

Is osteoarthritis only cartilage wearing away?

Selected-source overview · Independent review pending. Read the evidence context.

No. It affects multiple joint tissues, including cartilage, bone, the joint lining and surrounding structures. “Wear and tear” is an incomplete description.[1]

Evidence behind this answer

Osteoarthritis
agency explanation · 2023
Selected relevant page text or original publication abstract inspected · Whole-joint changes, common sites, age/injury, symptoms and variable course