The male foreskin often grows small red bumps may be caused by the foreskin glans, allergies, warts and other factors. 1. circumcision: men in the foreskin is too long, and do not pay attention to physiological hygiene, easy to repeatedly induced circumcision, may lead to small red bumps on the foreskin, accompanied by itching, tingling and other symptoms. 2. Allergy: such as wearing poor quality underwear, resulting in localized allergic reaction of the foreskin, may appear small red bumps, accompanied by itching, pain, and in severe cases there will be oozing, and easy to secondary bacterial infection. 3. warts: most of the unclean sex related, but also may be caused by indirect contact, can make the foreskin localized small red bumps, accompanied by mild itching and pain, and has a certain degree of contagious. The male foreskin often long small red bumps, and accompanied by itching, pain and other abnormal manifestations, it is recommended that the doctor for examination and treatment.