In osteoarthritis (OA, or “degenerative arthritis”) the cartilage layer wears out, resulting in direct contact between the bones and producing pain and deformity.

Tennis elbow is a form of tendonitis that causes pain over the bony prominence called the lateral epicondyle on the outside of the elbow.

The biceps muscle is in the front of your upper arm. It helps you bend your elbow and rotate your forearm. It also helps keep your shoulder stable.

Carpal tunnel syndrome (CTS) is a condition brought on by increased pressure on the median nerve at the wrist.

A mallet finger is a deformity of a finger caused when a certain tendon (the extensor tendon) is damaged. When a ball or other object strikes the tip of the finger or thumb, the force damages the thin tendon that straightens the finger.

Boutonnière injury is the result of an injury to the tendons that straightens the middle joint of your finger.