This condition is a tear of the labrum in the shoulder joint. The labrum is a ring of cartilage around the shoulder socket that stabilizes the head of the humerus. A SLAP tear occurs at the point where the biceps tendon attaches to the labrum.

This is an injury of the acromioclavicular joint (commonly called the "AC" joint). This is the joint where the clavicle meets the scapula. A shoulder separation is a stretching or a tearing of the ligaments that support these bones.

This is a looseness of the shoulder joint. With it, your arm slides around too much in the socket. It may slip out of the socket easily. Instability can happen because the ligaments that hold your shoulder together aren't tight enough.

This is a painful pinching of soft tissues in your shoulder.

The shoulder is a ball-and-socket joint. The ball of your upper arm bone fits into a socket in your shoulder blade. If the ball slips out, your shoulder has "dislocated."

The rotator cuff is a group of muscles and tendons in each shoulder. It holds your upper arm bone in your shoulder socket. It keeps your arm stable while allowing it to lift and rotate. Too much stress on the rotator cuff can cause a tear.

The rotator cuff muscles and tendons hold your upper arm bone in your shoulder socket. A hard fall, repetitive arm motions or problems with the structure of your shoulder can injure the rotator cuff.

Rheumatoid arthritis is a disease of the immune system. This is the system that protects you from infection. RA may cause pain and stiffness in your shoulder where the humerus (the bone of the upper arm) meets the shoulder socket.

This condition is a fracture of the head of the humerus - the "ball" of the shoulder's ball-and-socket.

This condition is a deformity of the spine. With it, your vertebrae change from a cylindrical shape to a wedge shape. Your spine may begin to curve forward. Eventually, this gives your upper back a rounded appearance.

Osteoarthritis, also called degenerative arthritis, is a gradual breakdown of cartilage in the joints. Cartilage is a tough, flexible connective tissue that protects the ends of bones in the joints.

Some of the muscles in your shoulder have opposing roles. When you move your arm, certain muscles contract while their opposing muscles relax. But when a muscle becomes much stronger than its opposing muscle, your shoulder can become unstable.

This condition is a traumatic fracture of the humeral head that leaves an indentation in the bone. This changes the shape of the humeral head and can interfere with normal arm motion.

This condition is a deterioration of the facet joints, which help stabilize the spine and limit excessive motion.

If you have pain in your shoulder, you may have a torn labrum. That's the thick band of tissue that goes around your shoulder socket. It helps make the socket deeper. It cushions the bone of your upper arm and keeps it from slipping.

This condition is a loss of motion or stiffness in the shoulder, usually accompanied by pain in the joint.

This condition is a break of the scapula, the large, flat, triangular bone that contains the shoulder socket. Because the scapula is well protected by the muscles of the shoulder, scapula fractures are uncommon.

This condition is a fracture of the bony bump that is located opposite of the head of the humerus. This type of fracture can interfere with the rotator cuff.

This is a fracture of a part of the shoulder blade called the "glenoid." This is the socket that holds the head of the humerus (the bone of the upper arm). A glenoid fracture can allow the head of the humerus to slip out of the socket.

This is a common shoulder injury. It's a break of the bone that rests between the shoulder blade and the sternum. We call it the "collarbone." Your collarbones help connect your arms to your body.