The shoulder is made up of three bones, the humerus, scapula, and clavicle. The shoulder is a ball and socket joint where the ball of the upper arm bones fits into the socket in the shoulder blade.
The arm is kept in the socket by the rotator cuff, a network of muscles that come together as tendons. The rotator cuff attaches the humerus to the shoulder blade and helps to lift and rotate the arm.
Rotator Cuff Tear
A torn rotator cuff weakens the shoulder, making daily activities painful and difficult. When one or more of the rotator cuff tendons are partially or completely torn, the tendon is no longer fully attached to the humerus.
Dislocations of the shoulder occur when the bones of a joint do not line up properly. This can also be called a “separated shoulder”.
- Pain on the top of the shoulder
- A rise in the skin at the top or front of the shoulder
- Inability to move your arm
The most common type of arthritis in the shoulder is osteoarthritis, or wear and tear arthritis. Osteoarthritis develops slowly, eventually causing swelling, stiffness, and pain.
- Pain with activity
- Limited range of motion
- Cracking sensation with movement