What Causes Irritation And Skin Peeling When Melas Lotion Is Used?

Hi, may I ask only question.sir i have been using melas lotion n cream for 1 month.a little bit skin peal is free everyday.n i have irretaion in my upper lips n chin when i apply it over this area.i have no irretation over all face.i also have dark complextion on this area.sir plz suggest me that wht should i do about skin peal n irretation.n i also don't want to leave to apply it bcoz it is vry effective