A bursa is a membrane near a joint that acts as a cushion between the muscle and bone. The bursa reduces friction caused by movement and makes the joint more flexible.
Bursitis is inflammation of a bursa. It is a common condition that often happens when a joint is overused, such as when throwing a baseball or painting a wall. More rarely, bursitis can be caused by gout or an infection. Bursitis is more common in people who are overweight, elderly or diabetic, although it also...Read more