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It could be molluscum contagiosum. It is a relatively common viral infection of the skin that results in round, firm, painless bumps ranging in size from a pinhead to a pencil eraser. If the bumps are scratched or injured, the infection can spread to surrounding skin. In adults with an otherwise normal immune system, molluscum contagiosum involving the genitals is considered a sexually transmitted infection. It spreads through direct person-to-person contact and through contact with contaminated objects. The bumps usually disappear within a year without treatment but doctor-assisted removal is also an option.
It doesn't seem to be herpes or molluscum contagiosum. It could be warts.