Night cramps (often called nocturnal leg cramps) are sudden, painful muscle contractions that commonly affect the calves, feet, or thighs during sleep. They can happen to anyone, but some people are more likely to experience them.
People at higher risk include:
- Older adults
- Muscle changes with aging, reduced flexibility, and changes in nerve function can make cramps more common.
- People who are inactive
- Long periods of sitting or limited movement may contribute to muscle stiffness and cramping.
- People who overwork their muscles
- Intense exercise, prolonged standing, or sudden increases in activity can strain muscles.
- Pregnant people
- Leg cramps are common, especially during later pregnancy.
- People with dehydration or fluid loss
- Heavy sweating, illness, or not drinking enough fluids may increase the chance of cramps.
- People with certain medical conditions
- Conditions affecting nerves, circulation, muscles, or metabolism may be associated with more frequent cramps.
- People taking certain medications
- Some medicines, including certain diuretics (“water pills”) and other drugs, may contribute to cramps in some individuals.
What may help prevent night cramps
- Stretch your calf and leg muscles gently before bed.
- Stay physically active with regular movement.
- Drink enough fluids for your body’s needs.
- Avoid sudden increases in exercise intensity.
- Wear comfortable, supportive footwear during the day.
When to talk to a healthcare professional
Seek advice if cramps:
- Happen often or are getting worse.
- Regularly disturb your sleep.
- Come with swelling, weakness, numbness, or changes in skin color.
- Begin after starting a new medication.
Occasional night cramps are common, but frequent or severe cramps may need evaluation to identify an underlying cause.
