Have you ever made a "wrong" movement, or change your position in bed at night, and feel a twinge in your lower back? A lot of people have."Some 85% of the population suffer from lower back pain ...

A pulled muscle — also known as a muscle strain — occurs when a muscle stretches too much, which causes the muscle fibers or tendons to tear. Pulled muscles commonly occur in the lower back or ...

The continual strain on your neck, shoulder and upper back muscles causes these muscles to tear (on a microscopic level). Your body tries to prevent this tearing by forcing these muscles to knot up.