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Glenohumeral Joint Separation

Deltoid Muscle: Shoulder Pain and Weakness

    The deltoid is the muscle that covers the tip of the shoulder. It contributes to pain in the shoulder and upper arm. One indication of problems with the deltoid muscle is pain is most intense during activity and subsides when resting the shoulder and arm.

    Subscapularis Muscle: Frozen Shoulder Pain, Rotator Cuff

      The subscapularis muscle is found on the inside of the shoulder blade. It can cause severe pain in the shoulder blade area that can also run down the back of the arm. Pain is also often felt in the wrist, but not the forearm.