There are many causes of cramps in calf muscles like dehdyration, electrolyte imbalances of sodium, potassium, magnesium, and calcium all can cause calf cramps. Heart medications and blood
pressure medications can also cause drop in potassium levels and
cramps. Electrolyte imbalances in diseases like diabetes, kidney disease, hypothyroidism, and Addison's disease all can cause calf cramps. Drink plenty of water and avoid dehydration. You should see a doctor and get evaluated.