1. Older Adults
The risk increases with age. As muscles and tendons naturally change over time, adults over 50 are more likely to experience nighttime muscle cramps.
2. Pregnant Women
Pregnancy, especially during the second and third trimesters, increases the likelihood of leg cramps. Changes in circulation, weight, and mineral balance may contribute.
3. People Who Exercise Strenuously
Intense physical activity, prolonged standing, or overworking the muscles can increase the risk of cramps later that night.
4. People Who Sit for Long Periods
Extended periods of sitting or inactivity can cause muscles to tighten, making nighttime cramps more likely.
5. People with Certain Medical Conditions
Night cramps are more common in people with:
- Type 2 Diabetes
- Peripheral artery disease
- Chronic kidney disease
- Hypothyroidism
- Liver disease
- Certain neurological disorders
6. People Taking Certain Medications
Some medications have been associated with muscle cramps in some people, including certain:
- Diuretics (“water pills”)
- Statins
- Some asthma medications
- Some medications used to treat osteoporosis
Do not stop a prescribed medication without speaking to your healthcare provider.
7. People Who Are Dehydrated or Have Electrolyte Imbalances
Not drinking enough fluids or having low levels of minerals such as potassium or magnesium can contribute to muscle cramps in some cases, although dehydration is not the cause of most nocturnal leg cramps.
How Can You Reduce the Risk?
You may be able to lower your risk by:
- Stretching your calf muscles before bed.
- Staying physically active with regular, moderate exercise.
- Avoiding sudden increases in exercise intensity.
- Drinking enough fluids, especially in hot weather or after exercise.
- Wearing supportive footwear if you stand for long periods.
- Reviewing your medications with your healthcare provider if cramps are frequent.
- Managing underlying medical conditions.
When Should You See a Doctor?
Seek medical advice if your night cramps:
- Occur frequently or severely.
- Last several minutes or leave persistent muscle soreness.
- Are accompanied by muscle weakness, numbness, or swelling.
- Disrupt your sleep on a regular basis.
- Begin after starting a new medication.
Key Takeaway
Night cramps are most common in older adults, pregnant women, people with certain medical conditions, those taking some medications, and individuals who overuse or underuse their muscles. Most episodes are harmless, but frequent or severe cramps deserve medical evaluation to look for an underlying cause and discuss appropriate treatment.
