A small bump on top of the genitals may be related to bad habits, scrotal eczema, circumcision and warts. Patients can be treated by paying attention to personal hygiene, antihistamines, antifungal drugs and antiviral drugs. 1. bad habits: usually do not do a good job of hygiene caused by a kind of external fungal infection, there will be a small pimple on top of the genitals of the phenomenon. It can be relieved by paying attention to personal hygiene, changing underwear frequently and antifungal drugs such as terbinafine hydrochloride ointment. 2. Scrotal eczema: it is an inflammatory skin disease, bad habits of the situation will form dirt and sweat stains can easily cause eczema, it will lead to a small bump above the genitals. Glucocorticoid drugs such as hydrocortisone cream can be used externally, and antihistamine drugs such as oral loratadine tablets can be taken for relief. 3. Circumcision: If the foreskin of a boy’s penis is too long, the accumulation of foreskin scales can cause bacterial and fungal infections, resulting in a small bump on the top of the genitals. Can apply terbinafine ointment, clotrimazole ointment and other antifungal drugs, apply mupirocin ointment, erythromycin ointment and other antibiotic drugs for relief 4. Condyloma acuminatum: caused by human papilloma virus infection, condyloma acuminatum patients genitals, anus and other parts of the reddish corn-like size of superfluous organisms. You can use imiquimod cream, acyclovir ointment and other antiviral drugs to treat it. When there is a small bump on top of the genitals, you should go to the hospital in time to find out the cause of the disease, under the guidance of the doctor for treatment, the drug needs to be used in accordance with the doctor’s instructions.