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When a muscle suddenly tightens on its own and doesn't relax, causing pain.

Stop doing the activity that led to the cramp. Massage the tight muscle. Gently stretch it. Place a warm towel or an ice pack on it. Have a sports drink to get electrolytes.

See a health care professional if the cramps:

• Are very painful.
• Happen often.
• Don't go away or don't get better with self-care.
• Aren't related to causes such as hard exercise or dehydration.