A bursa is a closed, fluid-filled sac that functions as a cushion and gliding surface to reduce friction between tissues of the body. The major bursae are located adjacent to the tendons near the large joints, such as in the shoulders, elbows, hips, and knees. When the bursa becomes inflamed, the condition is known as bursitis.
Bursitis is usually a temporary condition. It may restrain motion, but generally does not cause deformity.
The most common causes of bursitis are injury or overuse, although infection may also be a cause. Bursitis is also associated with other causes such as arthritis, gout, tendinitis, diabetes, and thyroid disease.
The following are the most common symptoms of bursitis. However, each individual may experience symptoms differently.
Bursitis can cause pain, localized tenderness, and limited motion. Swelling and redness may occur if the inflamed bursa is close to the surface (superficial).
Chronic bursitis may involve repeated attacks of pain, swelling, and tenderness, which may lead to the deterioration of muscles and a limited range of motion.
The symptoms of bursitis may resemble other medical conditions or problems. Always consult your physician for a diagnosis.
Bursitis most often occurs in people who are deconditioned, overweight, or older. Bursitis may also occur by overusing an affected limb, or by using an affected limb incorrectly.
In addition to a complete medical history and physical examination, diagnostic procedures for bursitis may include the following:
- x-ray - a diagnostic test which uses invisible electromagnetic energy beams to produce images of internal tissues, bones, and organs onto film.
- computed tomography scan (Also called a CT or CAT scan.) - a diagnostic imaging procedure that uses a combination of x-rays and computer technology to produce cross-sectional images (often called slices), both horizontally and vertically, of the body. A CT scan shows detailed images of any part of the body, including the bones, muscles, fat, and organs. CT scans are more detailed than general x-rays.
- magnetic resonance imaging (MRI) - a diagnostic procedure that uses a combination of large magnets, radiofrequencies, and a computer to produce detailed images of organs and structures within the body.
- arthrogram - an x-ray to view bone structures following an injection of a contrast fluid into a joint area. When the fluid leaks into an area that it does not belong, disease or injury may be considered, as a leak would provide evidence of a tear, opening, or blockage.
- aspiration - a procedure that involves removal of fluid from the swollen bursa to exclude infection or gout as causes of bursitis.
- blood tests - lab tests which are done to confirm or eliminate other conditions.
Specific treatment for bursitis will be determined by your physician based on:
- your age, overall health, and medical history
- extent of the condition
- your tolerance for specific medications, procedures, or therapies
- expectations for the course of the condition
- your opinion or preference
The treatment of any bursitis depends on whether or not it involves infection.
- aseptic bursitis - a non-infectious condition caused by inflammation resulting from local soft tissue trauma or strain injury.
Treatment may include:
- R.I.C.E. - Rest, Ice, Compression, and Elevation
- anti-inflammatory and pain medications, such as ibuprofen or aspirin
- ultrasound - a diagnostic technique which uses high-frequency sound waves to create an image of the internal organs.
- aspiration of the bursa fluid for evaluation in the laboratory
- injection of cortisone into the affected area
- septic bursitis - bursa that becomes infected with bacteria.
Treatment may include:
- antibiotic medications
- repeated aspiration of the inflamed fluid
- surgical drainage and removal of the infected bursa sac (bursectomy)