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.

Myofascial pain syndrome involves a cycle of muscle spasm and pain. Trigger points in muscles can cause pain in the area and ...

Rory McIlroy has been forced to withdraw from the Arnold Palmer Invitational with back spasms. McIlroy was on the practice ...

Add Yahoo as a preferred source to see more of our stories on Google. You've likely heard of sciatica before. The shooting pain that runs down your lower back, buttocks and leg can disrupt your daily ...

ORLANDO, Fla.(AP) — Rory McIlroy withdrew from the third round of the Arnold Palmer Invitational on Saturday when he felt muscle spasms in his back that were not going away. The spasms were not ...