9. Genital Acne
Many men panic when they detect some pimples on their penis. As much as it could be a cause of an alarm, occurrence of a pimple must not always show danger since it can appear to be harmless. The lumps can occur in a number of them or single. When this condition occurs, it is advisable for one to seek professional examination as it could also occur due to an STD, especially after unprotected intercourse.