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.

Muscle spasm: Unbearable pain. Until this muscular spasm stops one faces excrutiating pain! There is unbearable pain when the nerve gets pinched. The main reason for this is fatigue and weakness. If ...