Add Yahoo as a preferred source to see more of our stories on Google. A muscle spasm, also known as a cramp, twitch or charley horse, is the sudden and involuntary forced contraction of a muscle.

Posterior shoulder dislocation occurs when the top of the upper arm bone, known as the humerus, moves backward out of its socket. This causes pain, muscle spasms, and a limited range of motion. The ...

Whether it’s a dull ache or sharp spasm, pain between the shoulder blades can be caused by a variety of things. It can be due to bad posture while staring at a computer screen all day, an exercise ...

An anterior shoulder dislocation occurs when the shoulder slides forward out of the socket. It is usually the result of a sports injury, fall, or traffic accident. This shoulder injury is the most ...

ST. LOUIS — Astros third baseman Geoff Blum, who was scratched from the lineup Wednesday, is heading back to Houston to have his shoulder spasms evaluated. Blum will be examined by Astros physician Dr ...

Shoulder sprains and strains are both injuries that can happen due to overuse of or trauma to the shoulder. While the symptoms of the two are similar, they involve different types of tissue within ...

Pain between the shoulder blades is often due to muscle strain, which may result from lifting heavy objects, poor posture, or overuse. Other health issues can cause upper back pain, though, including ...