Night leg cramps, or nocturnal leg cramps, are sudden, involuntary muscle contractions that usually occur in the calves, feet, or thighs during rest or sleep. These painful spasms can last from a few ...

A muscle spasm — also known as a charley horse, muscle cramp or twitch — is a sudden, involuntary movement in one or more muscles. Common causes include stress, exercise, or dehydration, but nerve ...

Night leg cramps are sudden, painful muscle contractions in the calves, feet, or thighs, often occurring during sleep. These spasms, lasting seconds to minutes, can be caused by muscle fatigue, ...