Why do I get charley horses?
Last updated September 3, 2026.
A charley horse is a sudden muscle cramp - usually the calf at night - fed by overuse, dehydration, low minerals like potassium or calcium, and some medicines like statins or diuretics. The NHS says they are common and usually harmless. Stretching and standing on the leg end them faster. Pymander is a free AI doctor, 24/7 by text, and can help you find your pattern.
What to do
- In the cramp: stretch it - toes pulled toward your shin - or stand on the leg.
- Hydrate through the day, especially on exercise days.
- Stretch calves before bed if nights are your cramp time.
- Frequent cramps, a new medicine, or one swollen leg? See a GP.
Related questions
- Why do I get cramps in my feet?
- Why do my legs feel restless at night?
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- Why do I get calf pain when walking?
