If the back is sweaty, it may be due to high temperature, coupled with environmental factors, easy to sweat when irritable, this is a normal physiological phenomenon, do not worry, it may also be caused by Qi deficiency, Yang deficiency, Yin deficiency, depending on the evidence of different diseases to decide. If the back sweating is accompanied by fatigue, lack of energy, low vitality, easy fatigue, cold, etc., it is most likely caused by qi deficiency, yang deficiency, and can be regulated by taking Jin Kui Kidney Qi Pills. If the back sweating is accompanied by weakness in the legs, dizziness and tinnitus, insomnia and dreaminess, as well as physical wasting, hot flashes and night sweats, and irritability of the five hearts, etc., it is most likely caused by yin deficiency, so you can take Liu Wei Di Huang Wan for regulation and treatment.