Penile goosebumps can be caused by environmental factors, sebaceous cysts, infections, and allergies. 1. Environmental factors: in a cold environment, the hair follicles contract, may make the penis local skin goosebumps, is a normal performance, after adjusting the surrounding temperature, may gradually return to normal. 2. Sebaceous cysts: not washing the penis for a long time may lead to localized follicular pore blockage, inducing sebaceous cysts, which will lead to goosebumps on the penis. 3. Infectious factors: the presence of male circumcision or phimosis, poor hygiene, may be induced by the prepuce glans, due to inflammatory stimulation, can make the penis localized small pimples, accompanied by itching and pain and other symptoms. 4. Allergic factors: such as the use of some of the more irritating toiletries, so that the local skin of the penis allergic reaction, there can be red pimples, accompanied by intense itching and tingling. If the penis goose bumps, should be alert for disease factors, it is recommended to consult a doctor.