A member asked:

Hello! i've had a ~1 centimeter (flat) red area on my cheek for roughly 3 weeks. next to my mustache. first i thought it was a shaving rash. historically i don't have shave rash for more than a day. *i use low strength benzoyl perox for years daily?

2 doctors weighed in across 2 answers
Dr. Hiep Le answered

Specializes in Nephrology and Dialysis

Benzoyl peroxide should not cause the rash, especially you have used it for years. A rash which persists for 3 weeks is also not a shaving rash. Is the rash itching? How is its border and shape? Has its size changed in the last couple weeks?

Answered 12/11/2021

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The differential for a red patch on the face is very long. The fact that it has persisted for 3 weeks is not a particularly good sign. See a dermatologist for a proper diagnosis and treatment.

Answered 12/14/2021

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