Sweating in front of the chest when men sleep may be caused by physiological factors, pathological factors and so on. 1. Physiological factors: wearing too thick clothes when sleeping, the indoor temperature is too high, resulting in poor air circulation, thus affecting the body’s breathing, resulting in chest sweating phenomenon. 2. Pathological factors: If the body has hypoglycemia and hyperthyroidism, it will cause chest sweating, mainly because hypoglycemia will cause the body’s immunity to decline, and sweating occurs. Hyperthyroidism is caused by abnormal hormone levels in the body, excessive secretion of sweat, will also appear to sleep in front of the chest sweating. It is recommended to go to the hospital in time for consultation and treatment under the guidance of a professional doctor.