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The shoulder joint consists of two sections. The glenoid is the actual socket and the labrum is the tissue that surrounds the shoulder socket to provide the socket with stability. Injuries to this tissue rim can be caused by trauma or repetitive motion. Symptoms of a tear include pain, catching or locking, and grinding. Treatments are generally conservative and focus on medication and therapy. However, arthroscopic surgery is also an effective treatment glenoid labrum tears.