The cool glans may be caused by physiological factors, acute injury, prostatitis and other factors. 1. Physiological factors: a long time in the cold environment, the surrounding temperature is too low, will lead to glans cold, is a normal physiological phenomenon, the surrounding temperature can be returned to normal after the change. 2. Acute injury: the glans suffered acute injury, may need to be pressurized bandage, bandage is too tight, resulting in the glans part of the blood flow is not smooth, may make the glans cool, bandage lifted after the return to normal. 3. Prostatitis: Frequent sexual intercourse, drinking and smoking for a long time, and holding urine for a long time may induce prostatitis, which may also lead to a cool glans, accompanied by perineal swelling and pain, frequent urination, and incomplete urination. A cold glans and other uncomfortable symptoms indicate that there is an abnormality, and it is recommended to consult a doctor for examination and treatment.