A muscle spasm — also known as a charley horse, muscle cramp or twitch — is a sudden, involuntary movement in one or more muscles. Common causes include stress, exercise, or dehydration, but nerve ...

Most people have likely had the unpleasant experience of a muscle cramp, also known as a charley horse or muscle spasm. And while most cramps will quickly go away on their own, there are a few helpful ...

Heat cramps are painful muscle spasms that occur due to exercise in hot and humid conditions. While heat cramps aren't dangerous, they can be a sign of heat exhaustion or heat stroke. To avoid heat ...