Night cramps (often called nocturnal leg cramps) can happen to anyone, but some people are more likely to experience them. Higher-risk groups include:
- Older adults — muscle mass and nerve function changes with age can increase the chance of cramps.
- Pregnant people — especially in later pregnancy, due to body changes and increased strain on muscles.
- People who are physically active or overuse their muscles — intense exercise, long periods of standing, or unfamiliar activity can trigger cramps.
- People who are dehydrated — low fluid intake, heavy sweating, or fluid loss may contribute.
- People with mineral or electrolyte imbalances — changes in levels of potassium, calcium, or magnesium can be associated with muscle cramps.
- People with certain medical conditions, including:
- Diabetes (especially with nerve involvement)
- Kidney disease
- Thyroid disorders
- Circulation problems
- Nerve disorders
- People taking certain medications — some diuretics (“water pills”), cholesterol-lowering medicines, and other drugs may be linked with muscle cramps in some people.
Occasional night cramps are common and usually not serious. Consider speaking with a healthcare professional if cramps are frequent, severe, worsening, associated with swelling or weakness, cause major sleep disruption, or occur with numbness or changes in skin color.
