Cause if shoulder pain
Calcium crystals accumulate within the tendon and generally causes no problems.
In some people shedding of these crystals cause s an acute inflammatory response resulting in sudden shoulder pain
Increases over a few hours subsides over days (sometimes longer)
Examination often limited by pain
Night pain is typical
Most commonly supraspinatus tendon but can happen around tendons and ligaments in ankle knee hip and elbow
Patients usually age 25-55yrs