Sweating under the blanket may be physiological reasons, there may also be pathological reasons, such as hyperthyroidism, tuberculosis and other reasons. 1. Physiological reasons: the quilt would have been a little stuffy, if the environment temperature is high, if the sympathetic nerves for a long time in the quilt will increase the secretion of sweat in order to regulate the body temperature, at this time for physiological sweating. 2. Hyperthyroidism: hyperthyroidism patients have too much thyroid hormone in the body, can promote the body’s metabolism and heat production, appear hot, sweaty, panic, excitement, shortness of breath and other symptoms. 3. Tuberculosis: If patients suffer from tuberculosis, they may have afternoon hot flashes, fatigue, poor appetite (poor appetite) and other clinical manifestations. Prolonged nest old sweat, exclude physiological causes, should go to the hospital in time to check, clear cause, for appropriate treatment.