Sweating in winter can be caused by physiological factors, but it can also be caused by diseases of the immune system, endocrine and metabolic diseases. 1. Physiological factors: for example, winter wear too thick, or winter time strenuous exercise, mental tension and other reasons can lead to physiological winter body sweating. 2. Immune diseases: for example, rheumatism, tuberculosis, dermatomyositis, rheumatoid arthritis, systemic lupus erythematosus, and so on, can lead to sweating in winter. 3. Endocrine and metabolic diseases: for example, hyperthyroidism, hypoglycemic episodes, etc. can also lead to winter sweating. Excluding physiological factors, winter body sweating patients should consult a doctor in a timely manner to identify the cause of the disease and then targeted treatment to avoid further development of the disease.