Apple Cider Vinegar
“Soaking [the blister] is the best, otherwise dabbing on vinegar works great also. It’s an old-time remedy that my husband’s grandmother taught me.” — Hannah Ackler
Dr. Wu says: “Apple cider vinegar has antibacterial properties, so it could help prevent infection once the blister pops. But even then — ouch! Vinegar is likely to sting, so if you use it, dip a cotton swab into the vinegar, and gently swab around the open or popped area