Cramps are painful involuntary contraction of a muscle or muscles, typically caused by fatigue or strain. Almost everyone experiences muscle cramps, which come without warning. What causes them, and what can you do to relieve them? Cramps occur involuntarily and you really don’t have much control over them. Nighttime leg cramps are usually sudden spasms, or tightening, of muscles in the calf. The muscle cramps can sometimes happen in the thigh or the foot. They often occur just as you are falling asleep or waking up.
Most common causes of muscle cramps are poor blood circulation in the legs overexertion of the calf muscles while exercising insufficient stretching before exercise and dehydration. Read more