Now I know I'm growing old.

Jump on the meds the Dr. prescribes, and take at least double the usual dosage of Lysine (it won't hurt you.) I'm sold on the apple cider vinegar dabbed on with a cotton ball on the blisters, stings for a few minutes. I follow the vinegar a while later with regular Calamine lotion (not Caladryl which made it worse for me) to dry them out. Good luck, hope you have a speedy recovery. Oh drink plenty of water too.