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 ...

When your body lacks vitamin D, it can disrupt several important functions, especially the bones, muscles and immune system.

Soren Almeida, 22, said the experience was "the scariest" moment of his life, and he wasn't sure if he would make it through.

If someone suddenly starts laughing or crying during an orgasm, it's natural to feel concerned. But these reactions are actually quite common.

Teeth that are unusually worn down can also be a sign of acid reflux. This causes stomach acid to seep into the mouth, which ...

Teeth that are unusually worn down can also be a sign of acid reflux. This causes stomach acid to seep into the mouth, which ...

Bruce Willis was spotted in Los Angeles this week as his wife Emma revealed the actor is unaware he has frontotemporal dementia—a neurological condition that prevents his brain from recognising its ...

Hiccups - and the comic 'remedies' associated with them - are often a cause of general amusement and joking. But how would ...

The next doctor insisted a breast exam was necessary after I described the weakness that turned my legs into Jell-O.