I had liquid nitrogen cryotherapy performed on the
plantar surface on my foot to remove warts. Within an hour of the procedure a large blood blister formed (circular, 3 inch diameter, protruded 1/2 inch). The pressure and pain grew, and I went into the clinic the next day because of the pain. They made a small incision, but the pain and pressure was only slightly relieved. I waited 6 more days and the blister only grew. When I returned to the clinic, they sent me to a surgeon.