Cryotherapy, also known as "Argon-Helium Knife Cryotherapy" or cryoablation, is a new substitute of traditional physical therapy. Cryotherapy is a kind of minimally invasive therapy which removes diseased tissues percutaneously. It is the first medical technology that adopts the guidance technology of space rocket, and it is the only high precision medical technology that has the dual effect of extreme cold and heat, and it has been approved to use in treating cancers by the America Food and Drug Administration.