Also referred to as Cryotherapy, liquid nitrogen or freezing therapy. Liquid nitrogen is delivered using a precise spray directly onto the skin lesion. It can be used to treat both benign and cancerous lesions avoiding the need for surgery. The advantage of cryosurgery is it allows treat of a large number of lesions in one clinic visit and it is relatively inexpensive compared to invasive procedures.
Liquid nitrogen is applied (-196°C) from a vacuum flask with a spray nozzle. This spray cools and destroys superficial layers of skin. Sometimes, the liquid nitrogen may be applied using a cotton wool bud. The treatment only takes a few seconds, then the skin is allowed to warm up. Repeated treatments may be required.