Sweating while sleeping can be caused by physiological factors and pathological factors such as prostatitis and varicocele. 1. Physiological factors: Overdressing, thick bedding, and high indoor temperatures may cause the sweat glands and pores to expand, resulting in sweating while sleeping, which is a normal physiological phenomenon that does not require much concern. This is a normal physiological phenomenon and there is no need to worry too much about it. Reduce the amount of clothing and bedding and keep the room ventilated. 2. Pathological factors (1) prostatitis: after holding back urine, sitting for a long time, resulting in prostate congestion and swelling induced prostatitis occurs, when the patient sleeps, blood circulation is affected, venous reflux is blocked, resulting in the surface of the pubic vein volatile steam, which causes the phenomenon of pubic sweating. (2) Varicose veins of the spermatic cord: the spermatic vein valves of men are not developed enough, and the smooth muscle of the wall of the vein plexus is weak, resulting in the left spermatic vein injecting into the left renal vein, and the right side of the vein converging into the inferior vena cava at the entrance to the backflow of the vein, the venous reflux is obstructed, and the blood vessels are tortuous causing the vapor to evaporate excessively, which results in the symptom of sweating in the pubic area when you sleep. If the patient sleeps in the pubic area sweating, it is recommended to consult a doctor in time to identify the cause of the targeted treatment.