Leg Cramps at Night: Causes, Prevention & Treatment
Nighttime leg cramps are sudden, painful muscle contractions, usually affecting the calf but sometimes the foot or thigh. They’re common, especially with increasing age, and often have no single identifiable cause.
š¦µ Common causes and contributors
Possible factors include:
- Muscle fatigue or overuse
- Dehydration
- Prolonged sitting or inactivity
- Pregnancy
- Certain medications
- Diabetes or nerve problems
- Kidney, thyroid or liver disease
- Peripheral artery or other circulation problems
Importantly, night cramps don’t automatically mean you’re deficient in magnesium or potassium. Evidence for routinely using magnesium supplements for ordinary nighttime cramps is limited and inconsistent.
ā” What to do when a cramp strikes
- Straighten the affected leg.
- Pull your toes gently toward your face to stretch the calf.
- Massage the muscle.
- If safe, stand and put weight on the affected leg.
- Try a warm shower or bath if the muscle remains tense.
š How to prevent them
- Stay adequately hydrated.
- Gently stretch your calves before bed.
- Regular light exercise may help.
- Avoid excessive alcohol.
- If your cramps started after a new medication, ask your doctor or pharmacist whether it could be contributing.
š What about quinine?
Although quinine can reduce cramp frequency, it isn’t recommended for routine treatment because potentially serious adverse effects can outweigh its modest benefit. Don’t self-treat nighttime cramps with quinine-containing products.
š© When to get medical advice
Talk with a healthcare professional if cramps frequently disrupt your sleep, are becoming more severe, or occur with muscle weakness, swelling, numbness or persistent pain.
