Osteoarthritis is a common disorder of joints. With aging, the cartilage becomes thin and hence breaks down. This limits the joint motion and causes intense pain. Osteoarthritis mainly affects the joints of hands, knees, hips, and toes. It often worsens with time and has no permanent cure. Middle or old aged people are commonly affected.

The actual cause of osteoarthritis is not clear. Researches show that wear-and-tear of bones often result in osteoarthritis. It may occur due to aging. This causes the deterioration of cartilages. As the cartilage is damaged, the covering of bones is removed. The bones start to rub against each other. This is assumed to be the cause of osteoarthritis. Genetic factors, overweight, fractures, etc can worsen the condition.