Night cramps (often called nocturnal leg cramps) are sudden, painful muscle contractions that usually happen in the calves, feet, or thighs during sleep. They can affect anyone, but some people are more likely to experience them.
People at higher risk of night cramps
- Older adults
- Night cramps become more common with age, possibly due to changes in muscles, nerves, and circulation.
- People who are physically active or overuse muscles
- Intense exercise, long periods of standing, or unfamiliar activity can strain muscles and trigger cramps.
- People who are dehydrated
- Not drinking enough fluids, especially with heavy sweating, may contribute to muscle cramping.
- People with certain medical conditions
Night cramps may be more common in people with:
- Diabetes mellitus (which can affect nerves and circulation)
- Peripheral artery disease
- Chronic kidney disease
- Nerve disorders
- Some thyroid or hormone-related conditions
- People taking certain medications
Some medicines may increase the likelihood of cramps in certain individuals, including some diuretics or medications that affect electrolytes. - Pregnant people
- Leg cramps are relatively common during pregnancy, especially later stages.
What may help reduce night cramps
- Stretch calf and leg muscles before bed.
- Stay hydrated.
- Keep a regular exercise routine without sudden increases in intensity.
- Wear comfortable footwear during the day.
- Ensure your diet includes adequate minerals through a balanced diet.
When to get medical advice
Talk to a healthcare professional if cramps:
- Are frequent, severe, or worsening
- Cause significant sleep disruption
- Occur with leg swelling, weakness, numbness, or skin changes
- Start after a new medication
Occasional night cramps are common, but repeated or severe cramps may be worth discussing with a healthcare provider.
