What condition is characterized by inflammation of a bursa?

Bursitis is characterized by the inflammation of a bursa, which is a small fluid-filled sac that acts as a cushion between bones and soft tissues, such as muscles, tendons, and skin. Bursae help reduce friction and allow for smooth movement at joints. When the bursa becomes inflamed, it can lead to pain, swelling, and restricted movement in the affected area. This condition often results from repetitive motion, prolonged pressure, or injury.

In contrast, tendinitis involves the inflammation of a tendon, which connects muscle to bone, while arthritis refers to inflammation of the joints themselves, affecting the cartilage, synovium, and surrounding tissues. Gangrene is a serious condition resulting from the death of body tissue, typically due to a lack of blood flow or infection, and is not related to bursal inflammation. Understanding the distinct nature of bursitis helps differentiate it from these other conditions.