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

Infectious agents can cause muscle twitching and spasms, too. The most commonly known is probably tetanus, which causes a phenomenon called lockjaw, where the neck and jaw muscles contract to the ...

Dear Dr. Roach • I am a 68-year-old woman in good health. For the past several days, I have had muscle twitches all over my body — subtle ones, but nevertheless almost constant. This odd event has me ...