My Daughter Applied Something On Her Nose To Reduce Blackheads.upon

My daughter applied something on her nose to reduce blackheads.upon the third day of using it, her nose has a reddish patch on it.am using aloe vera gel for these two days.the reddish patch is still there.(she also took one danzen that same night for her sore throat cum ear ache).what should be done to clear this .thank you. (P.s. she is still recovering from anorexia...16 years old)