Leg cramps may be caused by physiological factors such as cold and exertion, as well as pathological factors such as hypocalcemia and lumbar intervertebral disc herniation. 1. Physiological factors: due to cold stimulation, exertion and other factors, can lead to local muscle stimulation and spasm, leg cramps phenomenon, is a physiological phenomenon, local warmth, appropriate rest, can relieve muscle tension, relieve the phenomenon of leg cramps. 2. Hypocalcemia: Calcium ions can regulate the excitability of muscles. When the concentration of calcium ions in the blood serum decreases due to various reasons, it is easy to cause numbness of the soles of the feet or the symptoms of cramps. 3. Herniated lumbar intervertebral discs: Herniated lumbar intervertebral discs that press on the nerve roots can also cause numbness in the feet, which in turn can cause foot cramps. The causes of foot cramps are many, and may also be related to lower extremity venous thrombosis, fasciitis and other reasons, if the symptoms continue to be unrelieved, it is recommended to go to the hospital in time to identify the cause of the disease, and then targeted treatment.