| The bursa is what cushions the tendon and thereby helps prevent friction between the tendon and the bone. Unfortunately, constant rubbing of the tendon over the bone with high amounts of repetitive arm, shoulder, hip, knee and ankle motion can lead to enough friction of the bursa itself to cause the inflammation and irritation of the bursa called bursitis. For example, a person who throws a ball too many times at one interval may begin to cause this friction process in the shoulder or elbow. Another way that bursitis occurs is when compression of the bursa happens on a regular basis, such as a side sleeper who places a lot of shoulder or hip pressure when they lay down for long periods. In this case it would not take too much movement of this already compressed area to cause friction of the bursa. |
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| The most common tendon areas that become inflamed are the elbow, shoulder, hip, knee, ankle, and heel. Of course, bursitis can will vary with each person, as it strikes the areas you use and irritate the most. |
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