Best remedy I have come across for fever blisters, good old 70% isopropyl alcohol. I used abreva at the tingle phase, but the blister came up anyway the next morning. I applied the rubbing alcohol frequently and allowed it to dry. It will sting a little if exposed to healthy tissue so be careful. It cooled the blister, and stopped that annoying itchy feeling. I still occasionally used the abreva too. However, I will tell you the healing properties were mostly attributed to the isopropyl alcohol. I probably could've cut out the abreva completely because I only applied it once or twice and followed up with the alcohol. The next morning there was a small spot, where a darker scab had formed, barely noticeable, and not swollen or itchy at all. This was the quickest drying time I'd ever experienced in over 20 years. Normally it wouldn't taken me about 3 days with abreva only at a minimum before it would even start to dry up. I'd like to add that abreva doesn't seem to work as well for me anymore. Note: I used it at the first sign of the tickle, in the past abreva didn't allow the sore to come up. Just my personal experience.
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