A bursa is a filmy-coloured sac that protects and cushions joints. Bursitis means inflammation of one of the bursa sacs. The inflammation may result from arthritis in the joint or injury or infection of a bursa. Bursitis produces pain and tenderness and may limit the movement of nearby joints.
You can get bursitis in your shoulders, elbows, hips, knees, heels and big toe. Injuries, overuse and repetitive stress are common causes of bursitis. Certain diseases, such as arthritis and gout, might also cause it. It sometimes occurs with tendinitis.
Bursitis is usually treated with rest, ice, and medicines to ease pain and reduce swelling. Other treatments include ultrasound, physical therapy, steroid injections and, in rare cases, surgery. Stretching before exercise, strengthening muscles and resting when doing repetitive tasks might help prevent bursitis.