What is osteoarthritis?
Osteoarthritis is a condition affecting the joints, where the smooth cartilage that cushions the ends of bones gradually roughens and thins. Cartilage normally allows joints to move smoothly, so as it wears down, the joint does not move as easily, and the surrounding bone, tissues and lining can become affected, leading to pain, stiffness and swelling.
It most commonly affects the knees, hips, hands and spine, though any joint can be involved. Osteoarthritis is sometimes described as 'wear and tear', but this is a little misleading — it is an active process where the joint attempts to repair itself, not simply mechanical erosion. It usually develops gradually over years and is more common with age, though it is not an inevitable part of ageing and can be managed effectively.
Symptoms
Osteoarthritis symptoms vary depending on which joints are affected and how advanced it is. They often develop slowly and may come and go. Common symptoms include:
- •Joint pain, often worse with activity and eased by rest
- •Stiffness, especially after rest or first thing in the morning
- •Reduced flexibility and range of movement in the joint
- •A grating or crackling sensation when moving the joint
- •Swelling around the joint
- •Weakness or wasting of the muscles around the joint
Causes and risk factors
Osteoarthritis develops through a combination of factors that affect the joints over time. While the exact cause is not always clear, several things increase the likelihood of developing it:
- •Increasing age, as cartilage repair becomes less effective
- •Being overweight, which adds load to weight-bearing joints
- •Previous joint injury or surgery
- •A family history of osteoarthritis
- •Jobs or activities that put repeated stress on joints
- •Being female, particularly for osteoarthritis of the hands and knees
Treatment and self-management
While osteoarthritis cannot be cured or reversed, its symptoms can usually be managed well, allowing people to stay active and maintain a good quality of life. A central and sometimes surprising message is that movement helps. Regular, appropriate exercise strengthens the muscles supporting the joints, maintains flexibility, and reduces pain over time — resting too much tends to make joints stiffer and weaker.
Other key measures include maintaining a healthy weight to reduce load on the joints, which can significantly ease symptoms in the knees and hips. Pain can be managed with measures recommended by a doctor or pharmacist, and physiotherapy can provide tailored exercises and advice. Supportive footwear, aids and simple adaptations can help with daily tasks.
For severe osteoarthritis that does not respond to these measures and seriously affects quality of life, joint replacement surgery — particularly of the hip or knee — is a highly effective option that can dramatically reduce pain and restore movement. A doctor can advise when this might be appropriate.
Living well with osteoarthritis
A diagnosis of osteoarthritis does not mean an inevitable decline into pain and inactivity. With the right approach, most people manage their symptoms well and continue doing the things they enjoy. The foundation is staying active in a way that suits your joints — finding the balance between keeping joints moving and not overloading them. Pacing activities, alternating heavier tasks with lighter ones, and listening to your body all help.
Simple aids and adaptations can make daily life easier and reduce strain on affected joints. These might include supportive footwear, walking aids, jar openers and other gadgets for the hands, or adjustments to how tasks are done. An occupational therapist can suggest practical solutions tailored to your needs and the joints affected.
Managing the emotional side matters too. Living with a long-term condition and persistent pain can affect mood and motivation, so looking after your mental wellbeing, staying socially connected, and seeking support when needed are all part of living well with osteoarthritis. Many people find that a combination of staying active, managing weight, and using available support keeps them comfortable and independent for years.
Diet, supplements and joint health
People with osteoarthritis often ask whether diet and supplements can help, and while there is no special diet that cures it, some general principles support joint health. The most important dietary factor is maintaining a healthy weight, since excess weight significantly increases load and pain in weight-bearing joints like the knees and hips. A balanced diet that helps with weight management is therefore valuable in itself.
A balanced diet rich in fruit, vegetables, whole grains and healthy fats supports overall health and may help reduce inflammation. Various supplements, such as glucosamine and chondroitin, are widely used for joint health, though the evidence for their benefit is mixed and they do not work for everyone. If you wish to try a supplement, it is worth discussing it with a doctor or pharmacist, particularly if you take other medications.
Ultimately, the measures with the strongest evidence remain exercise, weight management, appropriate pain relief and physiotherapy. Diet and supplements can play a supporting role, especially through their effect on weight and general health, but they work best as part of this broader approach rather than as a standalone solution.