Olecranon bursitis

Olecranon bursitis (informally known as "student's elbow" or "baker's elbow") is a condition characterised by pain, swelling and inflammation of the olecranon bursa located in the elbow.

This bursa is located over the extensor aspect of the extreme proximal end of the ulna. In common with other bursae, it is in the normal state invisible and impalpable, and contains only a very small amount of fluid, but fulfills the function of all bursae in facilitating movement at a joint (in this case the elbow) by enabling anatomical structures to glide more easily over each other. Also in common with other bursae, it can become inflamed, producing a condition called bursitis. This is sometimes known as a "swellbow" or "water on the elbow."

Causes

Bursitis normally develops as a result either of a single injury to the elbow, or perhaps more commonly due to repeated minor injuries, such as may be caused by repeatedly leaning on the point of the elbow on a hard surface. The chance of developing bursitis is higher if one's job or hobby involves a repetitive movement, for example, tennis, golf and even repetitive computer work involving leaning on your elbow are common causes of bursitis of the elbow. The possibility of developing the condition is more common as one gets older.

As a reaction to injury, the lining of the bursa becomes inflamed. It then secretes a much greater than normal amount of fluid into the closed cavity...
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