The causes of calf cramps (due to a stress or night) are usually caused by an imbalance of supply of muscle in minerals (magnesium, calcium ,) and blood. This leads to dysfunction and causes muscle cramps (>> see under symptoms). It is not known yet the exact causes.
It is also believed that dehydration, excessive sports, taking certain medications (Neuroleptics, diuretics, statins, corticosteroids), having flat feet or thyroid problems can cause cramping of the calf.
