Masturbation can cause slight redness (from the friction of rubbing), but it should not cause bumps.  It’s a good idea to see a medical provider for evaluation if your bumps are still present.  If you are not sexually active, you’ll want to provide your doctor with information about any lubricants you’re using (especially household items, like soaps or shampoos) and personal grooming habits (like shaving).  Your genital area could be responding to something besides the actual masturbation.  If you are sexually active, making an appointment is even more important, as bumps can be a sign of infection.

Tags: masturbation, penis