Arthritis and Other Joint Diseases - Bursitis

The bursa is a fluid-filled sac located in the muscle near most joints. The fluid lubricates the joint, thereby providing smooth joint movement. Infection or injury may cause inflammation of the bursa. This condition is known as bursitis and can be very painful. The most commonly affected joints are the shoulder, knee, and hip.

Calcium deposits in the shoulder tendon or calcification of the bursa ( calcific bursitis ) leads to more painful shoulder problems. This may be similar to interstitial calcinosis , a condition in which calcium deposits are found in the skin and subcutaneous tissues of children. Recovery from calcific bursitis is achieved by medical care, minor surgery, and resting the inflamed joint. Radiation treatments can sometimes speed the recovery process.

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