Basically, an object (like a q-tip) is cooled using a chemical. Most if the time, this is liquid nitrogen. Then, the cold object is placed on the infected area and held against the wart for about 20- 30 seconds or so, at which point the skin usually gets numb and stings a bit. For the next few days, the wart will start to turn black and then eventually fall off after a week or two. Sometimes, warts will require a round of up to 5 treatments within 2 week intervals, but most warts don’t require more than a couple.
There are two options for cryotherapy, over-the-counter treatment or a visit to the doctor.
For over-the-counter treatments, check out Dr. Scholl’s: