[Acne] Why do zits take such a long time to go away (at least on my skin)?

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Whenever I get a large singular pimple, it’s red for several days and doesn’t come to a head for almost a week. Then it calms down with some benzoyl peroxide and salicylic acid treatment and then it is still bumpy, sometimes comes to a head a second time, bursts and then I put a pimple sticker on it. Eventually the pimple stickers stop picking up stuff and then the red mark is still there for awhile after (I am currently at that stage now after 3 weeks of this pimple on my cheek)All in all, it can take 1-2 MONTHS for singular zits to go away for me. Any way of speeding up that process? Products I use (and no more than 1-2x a day)-Benzoyl peroxide spot treatment -Clearasil cleaning pads -pimple patchesI also clean my face 2x a day and do a clay mask 1x a week.
Girls Blog 2015
Submitted by Djeter998