Pimple On Urethral Opening. They did not appear fluid filled but more like the white ulcer like spots you get inside your mouth but very tiny also. Other culprits include but are not limited to.

Could be a urinary tract infection could be urethral cystYou need to see a doctor for sure and i recommend a gynecologist. Uncommonly it can bleed or cause blood spotting in the urine or cause pain if it gets large. If you have been tested for herpes 1 and 2 infections and results are negative then herpes is less likely and it can be a small pimple from a mild skin infection in the region which healed by itself.
Gregory Hines answered 24 years experience Family Medicine.
Genital herpes-an STD that is usually itchy causes burning and painfully raw lesions that start as sore spots resembling bug bites but progresses over a few days to a blister or group of blisters and then an open ulcer. That I am just being paranoid. Pimples appear as small round bumps on the skins surface. Since then though Im always checking every possible spot for it to return including urethral opening Which I previously would have NEVER checked.