Small bumps on the scrotum are commonly found in several situations such as abnormal hair follicle tissue, mosquito bites, meatloaf, and STDs: 1. abnormal hair follicle tissue, some people have relatively large hair follicles, and hair follicles exist on the scrotum, which may manifest as small bumps, and patients will not have any symptoms and do not need to deal with them. 2, mosquito bites, if there are small mosquito bites, will also appear local small bumps, but more accompanied by local redness and swelling, with the local inflammation slowly subside, the symptoms will also slowly subside, generally will not have any after-effects. 3, the meat flab, some people will have the meat flab situation, manifested as a small local bulge, daily will not have any symptoms, however, after the meat flab squeeze or rub, there may be local inflammation performance, the local may have red swelling painful situation. 4, venereal disease, if there is a case of unclean sexual life, may be infected with venereal disease, such as syphilis, after the development of the second stage, there will be small bulges in the genitals, with the development of the disease will be further aggravated, the local condition will also be aggravated, while may be accompanied by circumscribed symptoms. In short, if you find small bumps on top of the scrotum, you can analyze them yourself in conjunction with the above. If you consider the disease, it is still recommended to seek medical attention and early treatment to avoid aggravation of the condition.