If you've ever felt a sudden, intense tightening in your muscles, you've experienced a muscle spasm, also referred to as a ...

If you have neck or back pain, or you’re dealing with ... a muscle relaxer (or muscle relaxant) for you. Having a muscle spasm means that one or more of your muscles is contracting and the ...

Hemifacial spasm (HFS) is a neurological disorder manifested by twitching on one side of the face due to involuntary contractions of the eyelid and other facial muscles. It usually begins gradually ...