Night cramps (nocturnal leg cramps) are sudden, painful muscle contractions that often occur in the calves, feet, or thighs during sleep. They can affect anyone, but certain groups are more likely to experience them.
People at higher risk of night cramps
- Older adults
- Night cramps become more common with age due to changes in muscles, nerves, and circulation.
- People who are inactive or sit for long periods
- Reduced muscle conditioning and limited movement can increase the likelihood of cramps.
- People who are dehydrated
- Not drinking enough fluids, heavy sweating, or hot weather can contribute to muscle cramping.
- People with certain health conditions
Night cramps may be more common in people with:
- Diabetes (especially if nerve damage is present)
- Kidney disease
- Thyroid problems
- Circulation disorders
- Nerve-related conditions
- People taking certain medications
Some medicines may be linked with muscle cramps in some people, including:
- Diuretics (water pills)
- Some cholesterol-lowering medicines
- Certain blood pressure medications
- Pregnant people
- Leg cramps are common during pregnancy, particularly in later months.
- People with muscle strain or overuse
- Increased exercise, standing for long periods, or unusual physical activity can trigger cramps.
What may help prevent night cramps
- Drink enough fluids throughout the day.
- Stretch your calves and legs gently before bedtime.
- Stay physically active with regular walking or strength exercises.
- Avoid sitting still for very long periods.
- Make sure your diet provides adequate nutrients.
When to get medical advice
Talk to a healthcare professional if:
- Cramps happen often or are very painful
- They wake you regularly from sleep
- You have swelling, weakness, numbness, or changes in skin color
- You recently started a new medication and symptoms appeared
Occasional night cramps are common, but frequent or worsening cramps may be worth evaluating.
