What is a muscle spasm?

Muscle Spasm: A sudden tightening of any muscle is a muscle spasm. This can be caused by excessive use or electrolyte abnormalities.

A: Cntraction od a muscle that does not relax due to a variety of reasons.

Irritated Muscle: Generally a muscle spasm is an irritation of that muscle. Sometimes this results in an abnormal continuation of muscle tension that results in pain longer than expected. Muscle spasms have a reason, its your body's way of telling you not to do what you just did.