A bursa is a small, fluid-filled sac that acts as a cushion between a bone and other moving parts, such as muscles, tendons, or skin. Bursitis occurs when a bursa becomes inflamed. People get bursitis by overusing a joint. It can also be caused by an injury. It usually occurs at the knee or elbow. Kneeling or leaning your elbows on a hard surface for a long time can make bursitis start. Doing the same kinds of movements every day or putting stress on joints increases your risk. Symptoms of bursitis include pain and swelling. Your doctor will diagnose bursitis with a physical exam and tests such as x-rays and MRIs. He or she may also take fluid from the swollen area to be sure the problem isn't an infection. Treatment of bursitis includes rest, pain medicines, or ice. If there is no improvement, your doctor may inject a drug into the area around the swollen bursa. If the joint still does not improve after 6 to 12 months, you may need surgery to repair damage and relieve pressure on the bursa. NIH: National Institute of Arthritis and Musculoskeletal and Skin Diseases

Inflammation (swelling, pain, and warmth) of a bursa. A bursa is a flat, fluid-filled sac found between a bone and a tendon or muscle. It forms a cushion to help the tendon or muscle slide smoothly over the bone. Bursitis may be caused by long-term overuse, trauma, rheumatoid arthritis, gout, or infection. It usually affects the shoulder, knee, elbow, hip, or foot.

Inflammation of a synovial bursa.

Inflammation or irritation of a SYNOVIAL BURSA, the fibrous sac that acts as a cushion between moving structures of bones, muscles, tendons or skin.

Pain and swelling of the bursa, the small fluid filled pads that act as cushions in or near the joints.

Painful inflammation of the bursa. It most often affects the hips, shoulders, and elbows.

Bursitis is acute or chronic inflammation of a bursa. The cause is usually unknown, but trauma, repetitive or acute, may contribute, as may infection and crystal-induced disease. Symptoms include pain (particularly with motion or pressure), swelling, and tenderness. Diagnosis is usually clinical; however, ultrasonography may be needed to...

Bursitis is defined as inflammation of a bursa. Humans have approximately 160 bursae.

Bursitis (bur-SY-tis) is a painful condition that affects the small, fluid-filled sacs - called bursae (bur-SEE) - that cushion the bones, tendons and muscles near your joints. Bursitis occurs when bursae become inflamed.

Bursitis is an acute or chronic inflammatory condition of a bursa. A bursa is a jelly-like sac that usually contains a small amount of synovial fluid. A bursa lies between a tendon and either bone or skin to act as a friction buffer and facilitate movement of adjacent structures. Over 150 bursae are located throughout the human body....

Bursitis, inflammation of a synovial bursa, the lubricating sac located around joints or between tendons and muscles or bones. Bursitis may be caused by infection or injury, by arthritis or gout, by calcium deposition along a tendon or joint, or by minor, usually repetitive irritation. Hence, risk...