Osteoarthritis and joint pain: what actually helps

The old story that osteoarthritis is simple "wear and tear" you should rest is wrong, and it is the single most unhelpful idea in joint pain. OA is an active process across the whole joint, and the joint adapts to use. The treatments with the best evidence are not pills but movement and strengthening, plus weight loss if you carry extra, with topical anti-inflammatory gels as the first-choice medicine. UK guidance (NICE NG226) puts exercise and weight management at the centre, and most people improve without surgery.

"Wear and tear" is the wrong model

For decades osteoarthritis was described as the joint simply wearing out, like a tyre losing tread, with rest the logical response. Modern joint biology tells a different story. OA is an active, whole-joint condition: the cartilage, the underlying bone and the synovial lining are all remodelling, and chronic low-grade inflammation from these tissues drives much of the pain and stiffness.² That distinction matters because it flips the advice. Cartilage has no blood supply and is fed by joint fluid that moves when you move; loading the joint within sensible limits helps it stay healthy, while prolonged rest weakens the surrounding muscle, stiffens the joint and tends to make pain worse.

This is why the headline message from NICE is that joint pain often increases a little when you start exercising, and that this is expected and not a sign of harm. Sticking with regular, consistent movement reduces pain and improves function over time.⁴ Hurt does not equal harm here. If you want the wider picture of how inflammation behaves in the body, our health library covers the mechanisms in more depth.

Exercise and strengthening: the strongest evidence there is

The best-supported treatment for osteoarthritis is exercise. A Cochrane systematic review of 44 randomised trials in knee OA found that exercise reduced pain by roughly 12 points on a 100-point scale and improved physical function by a similar amount immediately after a programme, an effect broadly comparable to anti-inflammatory medication but without the drug risks.³ A separate meta-analysis of 77 trials reported a moderate benefit (a standardised effect size around 0.5) for pain and function.⁵

Two honest caveats. First, the benefit fades if you stop: trial effects tend to peak around two months and decline over the following months once supervised support ends, which is why this has to become a long-term habit rather than a course of treatment.³ Second, no single type wins outright. Local muscle strengthening (for example, building the quadriceps for knee OA), general aerobic fitness such as walking or cycling, and mind-body approaches such as tai chi all help.⁵ NICE recommends offering tailored therapeutic exercise to everyone with OA, and considering supervised sessions, often with a physiotherapist, to get you started safely.⁴

Weight management: more is better than a little

If you are above a healthy weight, losing some of it reduces both the mechanical load and the inflammatory signalling that feed OA, particularly in the knees and hips. The evidence shows a dose-response: trials find that losing around 5% of body weight improves function, while losing 10% or more produces larger reductions in pain and substantially better function and quality of life.⁶ NICE puts it simply: any weight loss is likely to help, but losing 10% is likely to be better than 5%.⁴ Combining weight loss with exercise outperforms either alone.

Medicines: gels first, then think carefully

NICE is deliberately conservative about drugs, positioning them alongside exercise, not instead of it, at the lowest effective dose for the shortest time.⁴ The first-choice medicine for knee OA is a topical NSAID (an anti-inflammatory gel such as ibuprofen or diclofenac rubbed into the joint), which is considered for other joints too. Because it is absorbed mainly at the site, it carries far less gastrointestinal and cardiovascular risk than tablets.

If a gel is not enough, an oral NSAID may be considered, weighing gut, kidney, liver and heart risks, and usually with stomach protection (a proton pump inhibitor). Notably, NICE advises against routinely offering paracetamol for OA, stating there is no strong evidence it works, and against weak opioids except briefly when nothing else is suitable. Strong opioids should not be used.⁴

Supplements: glucosamine versus collagen

Glucosamine and chondroitin are the best-known joint supplements, but the evidence is genuinely mixed and mostly disappointing. A large network meta-analysis in the BMJ found that glucosamine, chondroitin and their combination did not meaningfully reduce joint pain or slow joint-space narrowing compared with placebo.⁷ NICE explicitly says not to offer glucosamine.⁴ Some later reviews report small effects for specific preparations, but the signal is weak and inconsistent.

The more interesting signal is for collagen peptides. A 2023 meta-analysis of randomised trials in knee OA found a moderate reduction in pain (a standardised mean difference of about 0.58) versus placebo, though it rated the trials as high risk of bias, and a 2024 review of 11 trials found improvements in both pain and function.⁸ It is promising rather than proven. We cover the mechanism and timing in detail in our piece on collagen for tendons and joints; if you are weighing it against the rest of your routine, the stack builder can help you avoid stacking things that duplicate.

Injections and surgery: when they come in

Injections are not a first move. NICE advises against hyaluronic-acid ("gel") injections, and says steroid injections can be considered when other options have failed or to help you get going with exercise, but only with the clear understanding that relief is short-term, roughly 2 to 10 weeks.⁴ Keyhole "wash-out" or debridement surgery is not recommended for OA.

Joint replacement is highly effective when the disease is advanced. NICE says to consider referral for hip, knee or shoulder replacement when symptoms are substantially affecting your quality of life and non-surgical care is not enough, and importantly says people should not be excluded on the basis of age, sex, smoking or body weight alone.⁴ Surgery is a considered step after the core treatments, not a substitute for them.

This article is educational and does not constitute medical advice, diagnosis, or a treatment recommendation. Medication uses described as “off-label” are not licensed for that purpose in the UK and should only be considered under qualified clinical supervision. Always speak to your GP, pharmacist, or a registered specialist before starting, stopping, or changing any treatment. If you have severe or alarm symptoms - unintentional weight loss, blood in your stool, difficulty swallowing, persistent vomiting, a fever, or severe pain - seek urgent medical care.