This is Dr. David
this sounds like pressure ulcer caused by the tight condom
if you had latex allergy, this would cause rash all over your penis
it would be too coincidental to be herpes. herpes tend to cause very painful ulcers in the genital areas like cold fever blisters in the mouth or lip area.
avoid sex for now.
you can use some neosporin on the area to help the area heal.
let me know if you have other questions.
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