Cryosurgery (or cryotherapy) refers to the application of extreme cold temperatures to treat a broad range of skin lesions and conditions such as: actinic keratosis (precancers), seborrheic keratosis, warts, molluscum, solar lentigines (age spots) and others.
Liquid nitrogen (at –321F) is used and may be sprayed onto, or applied directly to the lesion with a Q-tip or other instrument.
Cryosurgery is a quick procedure that may take a few seconds to a few minutes, depending on the type and number of lesions treated.
Most patients experience some discomfort immediately during and after the procedure. This generally fades quickly. Blistering may occur in patients who are very sensitive or when lesions require more aggressive treatment. Treated areas may heal with a spot that is darker or lighter than the surrounding skin.