Osteoarthritis Guide: Diagnosis, Treatment & Daily Function

What osteoarthritis involves

Cartilage, bone and other joint tissues can change in osteoarthritis. Knees, hips and hands are common sites. Stiffness after rest, activity-related discomfort, swelling and reduced movement can occur, but the course varies. “Inevitable wear and tear” is an oversimplification. NIAMS explanation.

A diagnosis does not mean all movement damages the joint, and it does not mean symptoms will steadily worsen. Use the affected activities as the starting point: walking to work, gripping a cup, standing from a chair or getting dressed.

Diagnosis and imaging

In a typical presentation, a clinician can diagnose osteoarthritis from the history and examination. NICE does not recommend routine imaging for everyone; atypical symptoms or concern about another diagnosis change that decision. NICE diagnostic recommendations.

Imaging changes and pain do not always correspond closely. A scan may show structural change without explaining all symptoms, and early problems may be less obvious on X-ray. NICE imaging evidence review. Ask how a test result would change management, rather than assuming an MRI is always more useful.

Build the plan around a meaningful task

Choose one or two outcomes you value. “Walk around the supermarket with fewer stops” is more concrete than “improve joint health.” A physical therapist can help translate the goal into suitable strength, endurance and movement work. Occupational therapy can help with hand tasks or work participation.

Write the initial difficulty, planned approach and review date in one place. Add practical barriers such as shift work, transport, cost or fear of a flare. A plan that fits your schedule is easier to maintain than an impressive programme that you cannot follow.

What the exercise evidence means

The 2024 Cochrane review included 139 trials. Compared with usual care or little education, exercise improved average pain by about 13 points and function by about 13 points on 100-point scales at the end of programmes. Certainty was low to moderate, and the authors judged the clinical importance uncertain. Programmes varied widely. Cochrane review.

An average is neither a promised result nor a reason to dismiss exercise if your first attempt was poorly matched. Discuss adjustments, support and how to monitor response in the exercise guide.

Medicines, procedures and supplements have different roles

Symptom relief can help you participate in rehabilitation. The choice depends on the joint and your kidney, cardiovascular, gastrointestinal and medicine history. Anti-inflammatory pain relief is not equivalent to disease-modifying treatment for rheumatoid arthritis.

Before an injection, ask about the expected duration, risks and what you will do if it helps or does not. Before a supplement, ask whether the relevant preparation was tested in people with your diagnosis. Neither a biological mechanism nor customer testimonials prove cartilage regrowth.

A 2026 update worth knowing

The current ACR summary is a September 2026 update, not just a reprint of the 2019 guidance. It adds a conditional GLP-1 receptor agonist recommendation for people with knee OA and obesity alongside diet and exercise, and changes its stance on some other interventions. The summary says its full manuscript is intended for journal submission. Read the ACR summary.

This is context for discussion, not permission to obtain a weight-loss medicine for any painful joint. The weight-management guide examines the applicable population and trial results.

When to reassess or discuss surgery

Return for review if walking, sleep or independence continues to deteriorate, or if symptoms change substantially. A surgical consultation is a discussion of options, not a commitment to an operation. Ask what has been tried adequately, which alternatives remain suitable, and what recovery would require.

A appointment prompt: “We agreed to focus on stairs; I still cannot manage them safely. What should change in the plan?” New heat, swelling, systemic illness or major injury requires a more urgent response than a routine progress appointment.

Hand, knee and hip OA do not have identical care options

The 2026 ACR summary conditionally supports knee braces and hand orthoses; NICE reserves routine device use for defined functional or biomechanical needs. A device is therefore a selected trial with a fitting and review point, not a mandatory purchase. ACR 2026; NICE NG226.

Erosive or inflamed hand OA: a specialist question

OA can involve inflammation, and selected hand-OA phenotypes are being studied separately. The METHODS trial enrolled 97 adults with hand OA and MRI-detected synovitis. At six months, the adjusted pain difference favored weekly methotrexate by 9.9 points on a 100-point scale (95% CI 0.6 to 19.3). Adverse events occurred in 62% versus 60%; the small study cannot establish every safety outcome. Wang et al.: METHODS hand-OA trial (Lancet 2023).

This does not justify methotrexate for ordinary knee or hip OA, and it does not prove structural repair. A clinician must distinguish erosive/inflammatory hand OA from rheumatoid or psoriatic arthritis. Bring the question to a rheumatologist rather than treating every hand pain as the same disease.

Comfort treatments and conflicting recommendations

Heat or cold may be used for comfort; protect the skin and avoid unmonitored extremes, particularly if sensation or circulation is impaired. Do not use a home modality to delay assessment of a newly hot swollen joint.

NICE advises against acupuncture/dry needling and several electrotherapy treatments for OA; its rationale cites uncertain or insufficient benefit. ACR 2026 conditionally supports acupuncture but recommends against TENS for knee/hip OA. These are disagreements, not proof that every add-on works. Agree on cost, a function goal and a stopping point. NICE recommendations; ACR recommendations.

Assess progress by daily function and treatment burden. Persistent impairment after a properly supported plan, or a substantially changed symptom pattern, is a reason to revisit the diagnosis and choices.