Advice: How Do I Deal with Dark Armpits? 

I'm African-American (a medium brown color) and my arm-pits are BLACK! At first, I thought that maybe I wasn't shaving correctly, and then, I realized that it's not hair that makes it dark.

I scrub them all the time (because I'm sort of a clean freak) but the skin around them just turns red. I think they're dark because of some antibiotics I was on when I was younger, but I'm not sure. 

How do I fix this? Does anyone else have this same problem?

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