Waking suddenly with a painfully tight calf or foot can be alarming. The muscle may feel as if it has turned into a hard knot, and even after the spasm releases, soreness can remain for hours. Nighttime leg cramps are extremely uncomfortable, but in many cases they are not a sign of a dangerous disease.
Still, recurring cramps should not automatically be blamed on dehydration or a lack of magnesium. Night leg cramps can have many possible triggers, ranging from muscle fatigue and prolonged sitting to medications, pregnancy, nerve problems,
