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 ...

Twitching leg muscles aren't uncommon after a long walk or exercise session. Although muscle twitches may cause you to worry about the health of your leg muscles, in most cases, twitching doesn't ...

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