Men who sleep with a weak sweat are usually caused by yin deficiency and fire, which is also known as night sweating. More likely to occur is tuberculosis and liver and kidney yin deficiency, kidney yin deficiency. Tuberculosis is usually caused by deficiency of yin and fluid due to deficiency of lung yin and burning of the veins. After the deficiency of lung yin, the sweating caused by deficiency of yin and fire or deficiency of qi and yin is accompanied by fatigue, coughing, coughing up phlegm and hemoptysis. If there are symptoms related to lung diseases, it is important to pay attention to the presence of tuberculosis, and it is necessary to go to a specialized hospital or a tertiary hospital to check the tuberculosis smear. However, most of them are usually caused by yin deficiency of liver and kidney or yin deficiency of kidney and yin, yin essence deficiency, yin deficiency and fire exuberance. They often have nighttime irritable heat and excessive sweating after falling asleep, their hands and feet like to put outside the quilt, they sleep poorly, dream a lot in their sleep, and they have flushing in the daytime with both sides of the whole body, accompanied by lumbar and knee soreness and weakness, and women may have irregular menstruation and menstruation in small amount, etc, all of them are caused by the deficiency of yin and fire exuberance.