Night cramps (also called nocturnal leg cramps) are sudden, painful muscle contractions that often happen during sleep, commonly affecting the calves, feet, or thighs. They are common and can happen to anyone, but certain groups have a higher chance of experiencing them.
Who is most at risk of night cramps?
- Older adults
- The risk increases with age due to changes in muscles, nerves, and circulation.
- People who are very active or overwork their muscles
- Heavy exercise, prolonged standing, or sudden increases in activity can trigger cramps.
- People who are dehydrated
- Losing fluids through sweating, illness, or not drinking enough water may contribute to muscle cramping.
- Pregnant people
- Leg cramps are especially common during later pregnancy.
- People with certain health conditions
Night cramps may be more frequent in people with:
- Diabetes mellitus, which can affect nerves and circulation
- Peripheral artery disease
- Chronic kidney disease
- Nerve disorders
- Some thyroid or hormonal conditions
- People taking certain medications
- Some medicines, including certain diuretics or other drugs that affect fluid and mineral balance, may increase cramp risk in some people.
Ways to reduce the chance of cramps
- Stretch calf and leg muscles gently before bedtime.
- Stay hydrated.
- Keep a regular, moderate exercise routine.
- Avoid sudden increases in strenuous activity.
- Wear supportive footwear during the day.
When to speak with a healthcare professional
Seek advice if cramps are:
- Frequent, severe, or getting worse
- Associated with swelling, weakness, numbness, or skin color changes
- Disrupting sleep regularly
- New and unexplained, especially after starting a medication
Occasional night cramps are usually harmless, but repeated episodes may be worth discussing with a healthcare provider.
