The phenomenon of frequent leg twitching, consider local cold or excessive exercise, too fatigue caused, if it is itself hypocalcemia, there will also be twitching phenomenon, the specific causes can be considered the following points: 1, cold: some patients do not do a good job of leg warming, such as wearing single pants in winter or often stay in the air-conditioned room, in the air outlet directly to the cold wind, etc., there will be frequent leg twitching phenomenon 2, excessive exercise: the patient’s exercise is too much, a large amount of sweating will cause excessive water and salt loss in the body, causing a decrease in sodium ions and a relative increase in potassium ions, resulting in muscle twitching, or the ambient temperature before exercise is low, and the patient does not do a good job of warming up, as well as after a lot of exercise, due to hot and cold stimulation, resulting in frequent leg twitching; 3, hypocalcemia: the blood calcium level of adults is about 2.2 – 2.6 mmol/L, lower than this value is called hypocalcemia, will make the neuromuscular excitability rise, muscle spasm resulting in leg convulsions; 4, lower limb ischemia: lower limb venous thrombosis or lower limb vascular stenosis, resulting in insufficient blood supply to the legs, causing ischemic leg convulsions; 5, nerve root compression: when the patient lumbar disc herniation, or the occurrence of degenerative spinal disease osteophytes will compression of nerves, resulting in inflammation of the nerve root, in the area of innervation where inflammation occurs, the leg muscles will appear spasm, numbness or pain. Patients are advised to massage and rest to relieve leg twitching and spasms, but if they still cannot be relieved after resting, it is recommended to go to the hospital in time to avoid delaying the condition.