Leg twitching is a sudden contraction or release of a muscle. Leg twitching when trying to relax can sometimes be a sign of a health condition, such as restless leg syndrome. When signal misfires ...

Hiccups are sudden, involuntary contractions of the diaphragm, the muscle that separates the chest from the abdomen and plays a key role in breathing. These contractions cause the vocal cords to close ...