haha this was funny And yes certain blisters on the mouth are caused by the herpes simplex virus which doesnt affect genitalia so dont worry, Ive gotten them since I was a kid, whenever I start feeling them I take 400-800mg of aciclovir which needs to be prescribed but there are over the counter creams for cold sores As to the burning, it is common because accutane dries the shit out your face which by now u prob know. At night I use cera ve moisturizing cream which is very creamy and heavy, and also some prescribed creams for the day which your dermatologist should recommend and always wear a good facial sunscreen