Sweating on the legs at night can be physiological, such as indoor temperature is too high or too thick clothing due to pathology, such as body qi deficiency, yin deficiency due to. 1. night sleep legs sweat, first of all to exclude physiological, such as the night cover too much bedding, the environment temperature is too high. 2. There are many pathologic reasons for sweating, night sweating in Chinese medicine is considered to be common in qi and yin deficiency caused by night sweating, this sweat is more in the night time when you sleep, waking up after the sweat can stop. If this situation occurs, we should consult a doctor in a timely manner, to the regular hospital with the doctor to use the appropriate drugs for treatment, during the treatment period to pay attention to dietary adjustments, maintain a good emotional state, strengthen their own exercise, improve immunity, to help the body to recover quickly.