Waking suddenly with a painfully tightened calf can be alarming. One moment you are asleep; the next, a muscle in your leg feels as though it has twisted itself into a hard knot.
These episodes are known medically as nocturnal leg cramps. They are sudden, involuntary muscle contractions that occur while a person is resting or sleeping. The calf is affected most often, although cramps can also occur in the feet or thighs.Find Treatments
A cramp may last only a few seconds or continue for several minutes. Even afterthe
