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.

Add Yahoo as a preferred source to see more of our stories on Google. Unfortunately, pain and injury can be a few downsides of an active lifestyle. A combination of genetics and incomplete cool-downs ...

Back pain before 30 is not normal if it is frequent or persistent.

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 ...

Dear Doctors: My lower back went into spasm as I was washing the dishes. I figured it was from bending over, but my mom insists it’s from being so stressed out. (My family is dealing with severe ...