Patients always twitch their legs when they sleep at night, consider the following causes: 1. If they are elderly, the leg twitching may be caused by osteoporosis and calcium deficiency; 2. Patients who are used to leaving their legs bare for a long time when they sleep at night, especially when the weather is colder, will easily lead to the nerves in the patient’s legs being stimulated by the cold, and twitching will also occur; 3. Patients always twitch their heads at night to consider some diseases, such as restless legs syndrome, which can lead to unnamable pain in both lower limbs and the need to walk on the ground to relieve the symptoms; 4, patients always twitch their legs at night to sleep, may also be caused by excessive fatigue of the legs, patients who are too active during the day, easy to produce some lactic acid metabolites, can not be discharged in time The situation will easily lead to leg muscle spasm and twitching.