I have really tried a lot during my long-suffering cold sores time, but so far no remedy has helped as quickly and visibly, as the Silica Gel: It freezes the bubbles and then a quasi dries them out. Burns at the beginning and twinge of course quite, because any moisture is withdrawn from the inflamed site, but if you consistently with a Q-Tip dabbed the gel for two days on the inflamed area and the white film that has formed, beautiful top leaves, you can already see on the third day to nothing more of the vesicles and also the pain is then almost completely disappeared. - Otherwise, it takes so days until the bubble "grown" and finally bursts. This phase one skips thanks Sil. Oral Herpes Gel easily and goes directly to the healing phase.
So right at the first sign cream on it and are pleased that you have nothing left in a few days it looks. If you can not cure this annoying disease already, but then at least contain the damage!