Freezing or Cryosurgery Kits for Warts

Relatively new on the market are so-called freezing kits. These try to duplicate the effects of liquid nitrogen on the skin. Instead of liquid nitrogen, the material is freon. This is a refrigerant.
The effects of freon are similar to those of liquid nitrogen. The refrigerant spray hits the wart and freezes it. The wart then crumbles off. Only one application is recommended.

This over-the-counter treatment is expensive. It is also not found to be very effective in killing off Plantar Warts. You can never apply it to facial warts. There is also the problem of removing pigment. This particularly applies if you have dark skin. Where you use the spray, you may find a white spot.