Sorry, can't tell from a description. It sounds like an irritation to me. The peroxide may well have aggravated the irritation and should not be repeated. I suggest you see a doctor ASAP (not because it's an
emergencyEmergency airway puncture
Emergency contraception, but because the doctor will only be able to tell what it is if the
spotBirthmarks - pigmented
Liver spots
Measles, koplik spots - close-up
Mongolian blue spots is fresh. If that can't be arranged, take a good photo and bring it along to your appointment. Meantime, just gentle cleansing please.
Take care.
Dr. Rockoff