I am not sure what you mean by brown spots- do you mean that the
blackheads are coming back, or that you
skin is discolored? I think you should see a dermatologist. If the blackheads are coming back, their are ointments and creams that are less abrasive that you could try. If your skin is discolored, it is probably from whatever chemical they used during the facial. Either way, I think you need to see an actual dermatologist to get treatment. Good luck.