Repeated small blisters on the penis can be considered overstimulation, folliculitis and genital herpes, etc. If accompanied by other discomforts, it is recommended to go to the hospital for further examination to clarify the cause of the disease. 1. Overstimulation: blisters or even blood blisters may appear on the front of the foreskin if there is excessive masturbation, overstimulation, and the penis is squeezed or traumatized, etc. The blisters are caused by the sweat glands and folliculitis on the surface of the penis. 2. Folliculitis: Since sweat glands and hair follicles are widely distributed on the surface of the penis, so if you usually sweat more and do not pay attention to cleanliness, etc., it may lead to the accumulation of oil and sweat causing folliculitis, which is manifested as repeated small blisters on the penis. 3. Genital herpes: If there are behaviors such as unclean sex, you may be infected with herpes virus, which can appear as small blisters on the penis and accompanied by pain. The above symptoms may also be caused by other factors, therefore, patients are advised to go to regular hospitals for further consultation and treatment in order to get well soon.