What Is Bursitis?

What Is Bursitis?

From your head down to your big toes, your body has lots of differently shaped and sized joints. Many have something in common near the area of the joint — a customized fluid sac that provides cushioning for movement and pressure. These small cushions are known as bursae (a single one is called a bursa). Bursitis is the term used to describe inflammation or irritation of a bursa. Bursitis can result from a direct hit or from repetitive joint movements (like a tennis serve).

If a bursa becomes irritated, either by a direct hit or from a nearby joint repeating the same movement (like a tennis serve), then bursitis can occur. People can also get bursitis when the body has to change its balance or movement to adapt to differences; for example, if a person has one leg that's longer than the other.