A back spasm involves a sudden, involuntary muscle contraction that can be set off by something as routine as lifting a bag or sitting for too long. Muscle fatigue, dehydration, and nerve irritation ...

Add Yahoo as a preferred source to see more of our stories on Google. Many of us have felt a muscle in some part of our body suddenly and involuntarily tighten, causing a twitch or even severe cramp.

Los Angeles Dodgers starter Tyler Glasnow exited Wednesday’s game against the Houston Astros before the second inning due to a lower back spasm. Glasnow, who had just recorded his 1,000th career ...

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 ...