What Is FreezPen Cryotherapy Technology? Cryotherapy is a procedure that utilizes extreme cold to destroy unwanted tissue. The process is called “Cryo-necrosis” – tissue destruction by rapid freezing. NO ANESTHESIA. NO DOWNTIME. NO SCARS. TREATS COMMON* LESIONS ON THE FACE AND BODY Dark spots Age spots Skin tags Warts Moles Fibromas Keratosis Angiomas Milia Molluscum Source: