URL of this page: https://medlineplus.gov/musclecramps.html

Muscle Cramps

Also called: Charley horse
On this page

See, Play and Learn

  • No links available



Muscle cramps are sudden, involuntary contractions or spasms in one or more of your muscles. They often occur after exercise or at night, lasting a few seconds to several minutes. It is a very common muscle problem.

Muscle cramps can be caused by nerves that malfunction. Sometimes this malfunction is due to a health problem, such as a spinal cord injury or a pinched nerve in the neck or back. Other causes are

  • Straining or overusing a muscle
  • Dehydration
  • A lack of minerals in your diet or the depletion of minerals in your body
  • Not enough blood getting to your muscles

Cramps can be very painful. Stretching or gently massaging the muscle can relieve this pain.

Start Here

Related Issues


Clinical Trials



Patient Handouts