My dd has a single blister, cold sore type thing just under her lip and has had an ulcer in her mouth as well but that has got better now. She also has a spot/blister type thing on her finger. I know her friends brother has HFM but not sure if her friend actually has it or not. She not had cold sores before but does often have ulcers when full of a cold,which she is atm. Would she have more blisters if it was hfm rather than just a couple? All the pictures online look horrendous!