Patients with cramps can be caused by several reasons: First, cold: it causes muscle spasmodic convulsions, and cramps appear. This is the time to pay early attention to keep warm and avoid working and living in a cold environment. Second, calcium deficiency: can lead to muscle twitching, and the phenomenon of cramps, this time to actively replenish calcium. Third, over-exercise or no warm-up: not sufficiently warmed up during exercise can also lead to the phenomenon of cramps, pay attention to the advance warm-up during exercise to avoid over-exercise. Fourth, neurological diseases: mainly due to the central nervous system stimulation and cramps, then to identify the cause, according to the cause of treatment.