Barely noticeable dude. Probably 2-3 months to really not be able to see it at all.

I had a breakout after using tretinoin (it was the purge stage, other than that tretinoin is amazing) and after the pimples went away, i had CRAZY hyperpigmentation. It's been 3 months since the HP appeared and it's pretty faded now. I mean you can still see it, which is why i;m considering a laser treatment. However it should be noted that my dermatologist recommended I don't undergo laser therapy or chemical peels because he said the HP will continue to fade over the next few months and it was completely unnecessary. Your HP just looks inflamed, I would stay away from any glycolic acid for now. Stick with moisturizer and sunscreen until the redness goes away, then you can go for the OTC treatment. Good luck!