Arthritis is a disease that causes pain and loss of movement of the joints. Joint pain is referred to as arthralgia. Arthritis is the leading cause of disability in people over the age of 55. The causes of arthritis depend on the form of arthritis. Causes include injury (leading to osteoarthritis), abnormal metabolism (such as gout and pseudogout), inheritance, infections, and for unclear reasons (such as rheumatoid arthritis and systemic lupus erythematosus). There are many forms of arthritis .There are about 200 different kinds of arthritis. The most common type is osteoarthritis (or degenerative arthritis), where the cartilage that protects the bones gets worn away. This makes joints stiff, painful and creaky. About 5 million people in the UK have osteoarthritis. OA is a chronic degenerative arthropathy that frequently leads to chronic pain and disability. With the aging of our population, this condition is becoming increasing prevalent and its treatment increasingly financially burdensome. Using radiographic criteria, the distal and proximal interphalangeal joints of the hand have been identified as the joints most commonly affected by OA, but they are the least likely to be symptomatic. Age is the most consistently identified risk factor for OA, regardless of the joint being studied. Prevalence rates for both radiographic OA and, to a lesser extent, symptomatic OA rise steeply after age 50 in men and age 40 in women. Occupation-related repetitive injury and physical trauma contribute to the development of secondary (non-idiopathic) OA, sometimes occurring in joints that are not affected by primary (idiopathic) OA, such as the metacarpophalangeal joints, wrists and ankles.