A member asked:

I used bp on my right cheek to get rid of my spot and it was open so it irritated my skin and formed blackheads.will it happen again on my left cheek?

A doctor has provided 1 answer
Dr. Emily Altman answered

Specializes in Dermatology

It is more likely that what happened was an irritation rather than allergy to benzoyl peroxide because it happened so quickly, but there is no way to tell for sure. Allergic reactions can happen within a day or two if a person was exposed to the substance earlier.

Answered May 17, 2016

5.1k views

Thank

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