Bursitis causes
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Sara Mehrsefat, M.D. [2]
Overview
Bursitis is commonly caused by repetition of movement or excessive pressure. Elbows and knees are the most commonly affected because they are rested upon more than many parts of the body with bursae and they also get the most repetitive use. Inflammation of bursae can also be caused by other inflammatory conditions such as rheumatoid arthritis. Scoliosis can also be a cause of bursitis of the shoulders although this is rare. Shoulder bursitis is more commonly due to overuse of the shoulder joint and muscles.
The other main cause of bursitis is traumatic injury, which can cause swelling of the bursae. The swelling itself causes irritation because the sac will no longer fit in the small area between the bone and the functionary. When the bone begins to increase pressure on the bursa, bursitis ensues.
Causes
Common causes of bursitis include:
- Direct injury or trauma
- Prolonged pressure (This can occur after prolonged kneeling or leaning on an elbow)
- Overuse or strenuous activity
- Infection
- Crystal-induced arthropathy (ongstanding or tophaceous gout)
- inflammatory arthritis (rheumatoid arthritis (RA) or spondyloarthritis).
- Drug Side Effects