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.

Middle back pain often arises from muscle strain, poor posture, or spinal conditions. Applying heat or ice to the affected area can improve middle back pain. Back pain that lasts more than three days ...

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