It is impossible to predict exactly , however most lesions require 1-2 sessions, there is a possibility for larger lesions you may require more sessions. For most lesions, cryosurgery is a permanent removal. Some lesions are harder to remove than others. In more delicate places eg the eye area, a shorter freeze time with a repeat procedure may be required to get a final result with the least damage to the surrounding skin. In other instances a deep lesion eg a wart may take several aggressive treatments to get final results