Burs, also known as bursae, are fluid-filled sacs found in the body that function as cushions or lubricators between surfaces that rub against each other, such as bones, muscles, and tendons. Burs serve to reduce friction and assist in smooth movement, allowing the structures to glide effortlessly against one another.
A bursa is typically composed of a thin, fibrous outer membrane called the synovium, which secretes a lubricating fluid known as synovial fluid. The synovial fluid helps decrease friction, facilitates easy movement, and aids in shock absorption. Bursae can be found in various locations throughout the body, particularly in areas prone to repetitive motion or pressure, such as the joints.
When a bursa becomes inflamed or irritated, it is referred to as bursitis. Bursitis can occur due to excessive or repetitive stress on the bursa, trauma, infections, or underlying medical conditions. Common symptoms of bursitis include pain, tenderness, swelling, and limited range of motion in the affected area.
Treatment for bursitis typically involves rest, applying ice or heat to the affected area, taking anti-inflammatory medications, and sometimes receiving corticosteroid injections. In severe cases, surgical intervention may be necessary to drain the bursa or remove it altogether.
Overall, burs play a crucial role in maintaining joint and tissue health by reducing friction and optimizing movement while also protecting sensitive structures from excessive wear and tear.
