i'm wondering, can you have a cold sore blister without any pain at all. also, i have absolutely no itching, not even once. :confused: i even had one doctor check it out and he thought it could of been a pimple.. so i popped it, and next day it's back.. still with no pain or itching whatsoever.. i pushed on the "blister" and then i pushed on a confirmed pimple on my face and the feeling was exactly the same. i wish someone could tell me for sure what this is, i'm from canada and i don't think we really do herpes testing too often, and i'm pretty hesitant to go and pay $100 or more for it even if we do. most people tell me that the blisters always itch or are at least painful, so i don't really know what to think.. i've come to think that it might have been a pimple, and i always assume the worst so i put zovirax on it, maybe it clogged it up and it got infected or something? keeping in mind i've never had a confirmed cold sore before.. ahhhh.. i wish i could figure this out.