Osteoarthritis is the most common form of arthritis, affecting around 8.75 million people in the UK. The main symptoms include pain and stiffness in certain joints of the body €“ most commonly the knees, hips and hands €“ as a result of changes to the cartilage, bones and ligaments. Not everybody with OA is affected in the same way and an individual may not experience the same symptoms in different joints.

Osteoarthritis does not have a specific cause. However, several risk factors increase the likelihood of someone developing the condition. These include age (OA is rare in people under 45 years), gender (women are more likely to develop OA than men), obesity (due to the additional pressure put on joints), family history, bone density and previous joint injury.

The first sign of OA is usually a slightly stiff and sore joint, particularly first thing in the morning, during exercise and at the end of the day. The joint may not move as freely as it once did, it may appear swollen, or make a creaking or cracking noise. Some individuals find that after a few weeks or months, symptoms appear to improve.

However, seeking medical help is important, as receiving a prompt diagnosis can greatly help to prevent further damage and minimise future problems. At the other end of the symptom spectrum are those who haven't sought help and who are more likely to experience problems such as muscle wasting and weakness, joint deformity, depression, and possibly impaired mobility.