[Misc] I am considering trying The Ordinary's (or any other brands if you have suggestions) azelaic acid and I have a few questions.

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1: I have some slight scars/very minor dents and the occasional whiteheads (when it happens, it's usually followed by more for a week, then it chills out) on my face from when I was younger and was wondering if azelaic acid would help with these.2: I primarily struggle with some cystic, some regular whiteheads and a lot of red marks and PIE/PIH on my upper back and I was also wondering how it might would do here. (I sleep with a shirt on, I try to keep my bed cold and I wash my bed stuff 1x a week)3: How bad is the purging? I suppose it might be dependent on the person but I'm just paranoid I guess.4: Also, how do I know if this is even for me? I don't really want to use benzoyl peroxide because of the bleaching effect it has and salicylic acid (on my upper back at least, never used it for my face) doesn't seem to help that much.5: Also, facial hair. Does it stop it or slow it? (I'm 17M and I don't want to mess with my facial hair growth if that makes sense)​Sorry if this is annoying haha, I wrote it out like this with the hopes of it being easier to respond to, but I appreciate you taking the time to read this. Thanks!
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Submitted by sexymuscles-