Inflammation in the bursal sac. A bursa is a thin sac around a joints that serves as a shock absorber between bone and surrounding soft tissue. The bursal sac is made up of a membrane that contains fluid. Trauma, friction, repetitive use can result in swelling that is localized, tenderness, pain in the affected area. Examples are bursas in the hip, knee, shoulder, or elbow areas,
Can be treated with supportive care, rest, ice, medications, and injections just to name a few.