You're relaxing on the sofa when suddenly your eyelid starts twitching. Or perhaps it's a muscle in your arm, your leg, or ...

Though many people experience muscle twitching, it's often incorrectly identified as a muscle spasm. While both are involuntary contractions of a muscle, muscle spasms and muscle twitching aren't ...

Tremors are involuntary shaking movements in one or several parts of the body. These abnormal movements happen because of muscle contractions. Most sources do not list spinal problems as a potential ...