Hi there.
I read through your query & will be best placed to give you a clear picture once a few questions have been answered.
First, your gender please & your age & are you married or/& sexually active?
Second, did you at some point have a partner with genital or other herpes infection?
Third, did you or have you indulged in
oral sex either as the recipient or the giver?
All things being accounted for, Yes, it is very possible to have
genital herpes on your chin especially if the questions I have raised are answered in the affirmative.
The treatment will vary on expectations, expertise & experience of your treating Dermatologist/Venereologist.
If in & around the Bangalore region, most welcome to call on me at Vikram Hospital to take this discussion further.
Always remember to practice "Safe Sex". Cheers.
Dr Praveen Rodrigues MD