Hello doctor, My niece has developed white patches on face. Previously it was only on cheeks. I consulted the dermatologist. He said its mere a allergy which will go off in few days.but now it has spread on whole face. I have attached the pic also. They are in dhanbad.pls guide what is it ,what can we do now and whom to contact if u know. We are really worried about him. Thanks, Durga