Most people encounter the problem of leg cramps, what are the causes of leg cramps, first of all, it is important to understand that leg cramps are also called muscle spasms in medical terms, the common causes are the following: first, patients are too tired, because the patient’s leg muscles are too tense during the day, the body can not get a good rest at night, still in a state of high excitement, will cause local muscle cramps, spasm phenomenon. Second, cold, hypothermia, the patient’s local blood flow stagnation, will also cause muscle spasms. Third, hypocalcemia, which mostly occurs in pregnant women, young children, patients with low body immunity and osteoporosis. Fourth, patients with local lesions in the lower extremities, such as venous thrombosis and arterial thrombosis, can develop muscle spasms.