My left arm pit always smells, it smells before and after a shower. My girlfriend didn't believe me, so we showered together. After i scrubbed it viscously with a fresh fragranced shower gel, the smell still lingered. The right arm put smells rarely, and only after exercise, or a long duration without washing. Deodorant doesn't help, what could the causes be?
Dear Chris, thanks for your question. The reason is that lots of bacteria reside inside the armpit skin (being the sweatglands, around the hairroots, and even in the epidermis, dermis or subcutaneous fat - as seen in this paper). The reason why one smells worse than the other is because of the fact that the armpit microbiome differs between left and right (we saw this - although often very small differences - for about half of the people we investigated).
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