HS commonly scars the skin. Armpits are likely to have HS because they have hair follicles. When follicles get clogged, sweat and keratin build up in them. Blocked hair follicles trap bacteria ...
10. Hidradenitis Suppurativa/Acne Inversa Another chronic health condition that can cause a rash in your armpit is hidradenitis suppurativa, also called acne inversa. In this condition, hair follicles ...