The shoulder can dislocate in any direction. Pain is intense and common. Swelling, numbness, and weakness soon follow. It's diagnosed with a physical exam and x-rays to rule out a fracture.
Treatment
Doctors replace the ball of the humerus into the joint by a procedure called reduction. The arm is put in a sling or a shoulder immobilizer for several weeks. After pain and swelling decreases physical therapy is started to restore the range of motion of the shoulder and strengthen the muscles.
A dislocated shoulder make an athlete more likely to have another injury, because ligaments may be stretched.

