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Most of the time, no apparent cause for night leg cramps can be identified. In general, night leg cramps are likely to be related to muscle fatigue and nerve problems. The risk of having night leg cramps increases with age. Pregnant women also have a higher likelihood of having night leg cramps. Several conditions, such as kidney failure and diabetic nerve damage, are known to cause night leg cramps. But if you have one of these, you're most likely aware of it and have symptoms other than night leg cramps.
Spasms may occur in any muscle in your body, such as those in your face, fingers or calves. Spasms can be brief or long lasting, uncomfortable or painful. A spasm may also be referred to as a muscle cramp. Leg cramps, sometimes called charley horses, are sudden and uncontrollable muscle contractions or spasms.They can occur with exercise or while sleeping and usually resolve just as quickly as they came.pasms and cramps can also be caused by neuromuscular disorders, such as multiple sclerosis or a spinal cord injury. Movement disorders called dystonias also lead to forceful contractions. Dystonias can be a complication of stroke. Certain medications can cause involuntary muscle contractions as well.