Tendonitis in an acute inflammation of the tendon of a muscle commonly caused by a load applied to the muscle. The injury occurs when the load is either too much or occurs rapidly when the muscle is unprepared.  Tendonosis involves a degeneration that is stimulated with chronic overuse. This degeneration of the collagen in the tendon can occur with large heavy repeated movement or small repeat movements such as turning a screwdriver repetitively. This process takes a longer time and is considered a chronic condition.

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