A cold penis and testicles can be a normal phenomenon, or it can be caused by poor local blood circulation. The temperature of the testicles and penis itself is lower than the temperature of the surface of the human body, if there is a lot of sweating, the evaporation of sweat can also cause the temperature to decrease, so it will be cooler to the touch. If you don’t pay attention to keep warm or the external environment is lower, the temperature of testicles and penis will be lower. If the immune system is low, the lack of energy can cause the local blood circulation is not smooth, resulting in the surface of the cold. Therefore, the penis and testicles cold if there is no other uncomfortable symptoms do not need treatment, usually pay attention to keep warm, do not wear too tight underwear, do not sit for a long time, and at the same time to actively exercise, improve immunity. If the penis and testicles are cold and accompanied by other discomforts, it is recommended to consult a doctor in time.