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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.
Some examples of muscle spasms youâve probably experienced at some point include menstrual cramps, diarrhea and lower back pain. One of the most common and agonizing types of muscle spasms is the charley horse, which causes cramping in the calf muscles so bad that it can wake you right up out of sleep. Other types can kick in when you stand up, get out of bed in the morning or just after exercising.