Our expert says:
You are probably going through a period where your are having relatively high testosterone levels with increased sebum(oil) production in your skin. The oil becomes black when coming into contact with oxygen. Treat this just as you would treat blackheads on your face - wash with a facial cleaning soap, and use with care some oxy 5 % gel on the areas most affected. If you get irritation or rash - rather only stay with the cleaning. It will get better with time.
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