Bumps on penis not herpes. It isn't until symptoms escalate that individuals realize that there is more going on down there than a zit or two. While the skin on the majority of the body is thick and relatively resilient, the skin around the genitals or other mucous membranes is thin and more at risk for irritation and infection. Depending on the cancer cell type, between five percent to 30 percent of precancers will progress to a malignancy. Genital pimples can be treated at home in a number of ways: They are easily passed on during vaginal, oral or anal sex. Herpes serologic test Your doctor will take a blood sample and send it to a lab for analysis of certain antibodies for HSV. Gonorrhea — A bacterial STD, gonorrhea can, in some cases, cause bumps on the penis. Tiny nicks or cuts caused by razors allow the bacteria to enter the body, causing a pus-filled boil to form. While not classified as an STD, it is contagious.