I started using a buddys old .1% ointment form. a couple years old, it worked great for warts
. So that ran out and the derm. perscribed .1%in a liquid for and it dint do any thing.So she perscribed .2% i used it once fine then i used it again and it blisterd and itched like crazy. It also looks like its speading alot bigger area It been three days later. Is this normaly