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Impingement occurs when inflammation, bone spurs, or fluid buildup causes a rotator cuff tendon to be squeezed and rub against a bone.
Every time you raise your arm above your head, the upper tendon in the rotator cuff (supraspinatus tendon) and the bursa that lies on top of the tendon glide on the underside of the upper end of your shoulder blade (acromion).
Over time, the tendon may wear against the underside of the acromion.
|Primary Medical Reviewer||William H. Blahd, Jr., MD, FACEP - Emergency Medicine|
|Specialist Medical Reviewer||Timothy Bhattacharyya, MD|
|Last Revised||November 30, 2011|
Last Revised: November 30, 2011
Author: Healthwise Staff
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