before i purchased a block of alum i had very little no acne after shaving, which was a huge improvement. after i started using alum after shaving i started to develope acne again, not as much as before i started wet shaving, but noticeably. so i decided to just use witch hazel and after shave, and i have seen a marked reduction in acne the last two weeks, so im wondering if alum has caused acne for anyone else, and why would it cause acne?
alum causing acne?