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Am I allergic to benzoyl peroxide?

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I decided to try this new cleanser from neutrogena, the rapid clear stubborn acne cleanser, containing 10% benzoyl peroxide. When I tried it my face went really red, a lot more red than when I've used other acne treatments not containing benzoyl peroxide. My face got a bit less red throughout the day, and i didn't think it was so bad anymore. However, when i woke up the next day, my face was really red again, it was a little swollen, and itchy. I did not reapply the cleanser, I've only used it once. Even the day after that, my face was still itchy, but not very red. Could I have used to much of the cleanser, did it contain too much benzoyl peroxide or am I allergic? Should I avoid other products containing benzoyl peroxide? Please help:|

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10% bp is VERY high. Expecually if this is your first time using it. Start with 2.5%. It does a great job and while it sounds like a low dosage, its still pretty strong. My skin does exactly what you described when I use the 5% one. Just stop using it and in a few days the redness will fade. Stay away from BP until the redness is gone, then begin the 2.5%. If you dont give your skin a chance to heal, as its very irritated right now, it will just get worse. 

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I agree that 10% is too high for a first try.  I burned my skin very badly as a teen even using 5% benzoyl peroxide cream.  It was so red and swollen that my mom let me stay home from school.  We thought it was an allergy at the time, but in retrospect I think it was because I got overly enthusiastic about getting rid of my acne and cleansed too much and put too much BP on after stripping my skin, which gave me a chemical burn.  I started my daughters out with a 2.5% benzoyl peroxide cream and they tolerated it very well. 

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