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Biceps Instability/Tendonitis

    Biceps Instability/Tendonitis

    The biceps muscle has a tendon that passes into the shoulder joint and attaches to the top of the socket. The tendon passes through a tunnel in the front of the shoulder and into the joint in a sheath that is made up of fibers from the top (supraspinatus) and front (subscapularis) rotator cuff tendons. This tendon can become inflamed or unstable because of impingement or a rotator cuff tear. The tendon can also become weak and frayed and sometimes will rupture spontaneously, causing immediate pain and sometimes a “popeye bulge” in the arm. Usually, shoulder pain after a biceps rupture resolves quickly without any treatment. Sometimes the biceps tendon needs to be released or repaired as part of a rotator cuff repair, as leaving it in a torn or unstable state can result in persistent pain even after a successful rotator cuff surgery.