This sounds like nothing more than a pimple, which are not infrequent on the
penisCancer - penis
Curvature of the penis
Penis care (uncircumcised)
Penis pain. Conceivably herpes could behave this way, but usually not. (One clue: herpes lesions are pretty superficial, but pimples are deeper; think of a herpes lesions as being on the surface of the skin, and pimples as originating "in" the skin. This isn't hard and fast, but if this started with a firm bump that later developed a whitehead, herpes is less likely.) It definitely isn't
molluscumMolluscum contagiosum
Molluscum contagiosum - close-up
Molluscum contagiosum - close-up of the chest
Molluscum contagiosum on the face.
Since pus has already drained, it is unlikely a health care provider will be able to make a definite diagnosis based on how the lesion looks; and the longer you wait, the less likely a viral culture would be positive, even if you have herpes. If it
clearsClear by design
Clear eyes
Clear eyes acr
Clear eyes clr
Clear-atadine
Clear-atadine children's up and nothing like it recurs, you probably need do nothing. But if you want even more certainty, you could have a blood test for HSV to help sort it out.
I hope this helps. Best wishes-- HHH, MD