Sleeping at night with cold body and cold sweat may be related to Yang deficiency. However, the exact cause needs to be decided based on the patient’s other symptoms. Yang deficiency refers to a series of clinical symptoms triggered by the body’s lack of yang energy and weakened warming function. Yang deficiency patients, may appear at night sleep cold body cold sweat phenomenon, but also often accompanied by dizziness, pale or grayish-black, waist and knee soreness (waist and knee soreness and weakness) and pain, the whole body is afraid of the cold (the most obvious double lower limbs), mental depression, loss of libido, like warm food, environment and objects, and so on. If the symptom of cold body and cold sweat at night sleep is not relieved for a long time or accompanied by other discomforts, consult a doctor in time to find out the cause and carry out targeted treatment.