A numbing cream (local anesthetic) is mostly used on affected areas to prevent any pain or discomfort for 30-45 minutes before starting the procedure. The dermatologist will place liquid nitrogen on diseased skin using a spray. The dose of liquid nitrogen and the choice of delivery method depend on the size, tissue type, and depth of the lesion. The liquid nitrogen is fed to the area under treatment and applied to the targeted abnormal tissue. The treated area gets frozen, dies, and then gradually will be slowly absorbed by the body.
Cryosurgery procedure in skin diseases is mostly an OPD procedure and the patient may go home immediately after the procedure. Care typically involves keeping the area free of contaminants. Sometimes oral antibiotics may be given to prevent infection and pain killer to improve discomfort post-procedure.