Sweating in winter is commonly caused by physiological reasons, such as high room temperature at night, or too thick quilt; also seen in pathological reasons, such as calcium deficiency and tuberculosis. 1. Physiological reasons, such as high room temperature in winter, or too thick quilt, indoor air circulation is not good, will sweat when sleeping at night. 2. Pathological causes, such as calcium deficiency, especially in children, when calcium deficiency occurs, there will be night sweating and night crying. You can follow the doctor’s advice to supplement calcium and vitamin D, pay attention to more sunshine, promote the absorption of calcium. It is also seen in tuberculosis, night sweating, sometimes there is a low fever, coughing, coughing up sputum, etc., we should go to the hospital to find out the cause. There are many reasons for night sweating, if the sweating is not relieved for a long time, or accompanied by other discomforts, you should go to the hospital in time.