I burn my face with glycolic acid. Will the brown spot go away?

Your brown spot is probably not going away on its own. My recommendation for many of my patients with the same problem is to pretreat with a retinoid (e.g. Retin-A) lightening agent such as 4% hydroquinone for at least 6 weeks then use a laser appropriate for your skin type to treat your hyperpigmentation followed my several months of the lightening topical cream and a retiniod.

Our office specializes in chemical peels.  For dark discoloration caused by home peels, we recommend early treatment with Melarase AM and Melarase PM creams followed by Melapeels performed once monthly. Best, Dr. Karamanoukian

I suggest posting picture and seeing a cosmetic dermatologist who is specialized in peels, laser and skin care.  Best, Dr. Emer.

I get asked in conferences ''what is the MOST dangerous peel?' My answer is not TCA, not Pheol crotton, no Jessnerns combined with other peels- it s the GLY peel.Yup the humble as pie AHA peel or the lunch time bandit. This peels need to be neutralised as the peel keeps going, and going, and going until it is topped. Remember the acid intestines from Aliens going thru all panels of the space ship? Gly peel is like that - until you nuke it with a simple solution - WATER. Consistent barrier on the epidermis plus absolute neutralizing of AHA will give good results. Now to you problem - yes, the burn will go - do the following - see a dermatologist1. Protect skin barrier. Bactroban or QV inensive or Vaseline2. Make sure infection does no occur (dermos job)3. Treatment of PIH or darkening skin with bleaching creams, Spf, and sunprotection. 4. Now back to the devil himself- the AHA peel. Start slow, see a professional, I would start at 20 , 20  35 , 35, 50 .. 50 70. Best wishes for a quick recovery,Dr Davin LimLaser DermatologistBrisbane, AUSTRALIA