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For over a year I have had clogged yellow pores and small bumps on my chest, which extends down below my breasts and up onto my upper back.
Lately I have been exfoliating, using a tea tree wash and applying a tea tree cream. That has taken away some redness but the majority of the bumps remain. Can anybody offer a solution to this? They cause no irritation but are very unsightly and embarrassing. 
Hi Ellen...2% Salicylic acid is great for breaking down matter trapped in pores, exfoliating pores and preventing clogs. Neutrogena Oil-Free Cream Cleanser is good...Stridex non-alcohol pads are also good for treating body acne in my experience. Look for any SA product with 2% and 3-4 ph level...you can google and find this info. If this doesn't help the clogs resolve on their own, about the only other thing you can do is extract the hardened sebum, either yourself or you could have done professionally at a salon. Hope this helps!