Leg Cramps at Night: Causes, Prevention & Treatment
Nighttime leg cramps are sudden, painful muscle contractions, usually affecting the calf or foot. They become more common with age and are often harmless, but frequent cramps can sometimes point to an underlying problem.
Common causes
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Muscle fatigue or strenuous exercise
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Prolonged standing or sitting
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Dehydration
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Pregnancy
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Age-related changes in muscles and nerves
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Certain medicines, including some diuretics and statins
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Less commonly, nerve, circulation, kidney, thyroid, or metabolic disorders
Sometimes no specific cause can be identified.
What to do when a cramp strikes
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Straighten the affected leg.
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For a calf cramp, gently pull your toes toward your shin.
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Massage the muscle.
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Stand and walk gently if you’re able to do so safely.
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A warm shower or heating pad may help relax the muscle.
How to reduce nighttime cramps
Regular gentle stretching of the calves before bed may help some people. Staying adequately hydrated and avoiding sudden increases in strenuous exercise can also be useful.
Don’t automatically take magnesium, potassium, or other supplements. They aren’t helpful for everyone and can be unsafe in people with certain medical conditions or medications.
When to see a doctor
Talk with a healthcare professional if cramps are frequent, severe, newly appearing, disturbing your sleep, or accompanied by weakness, numbness, swelling, or changes in the skin.
Sudden swelling and pain in one leg, especially with warmth or redness, needs prompt medical assessment because it can be a sign of a blood clot. If that occurs together with chest pain or sudden shortness of breath, seek emergency care.
