I removed dry calluses in this clinic with liquid nitrogen on my feet (on my toes) They gave me a piece of paper to read what the consequences would be. I didn't find anything particularly scary, I agreed to treat 3 toes on both feet. The result is terrible blisters on the fingers 3 times larger than the finger. It is impossible to walk, with difficulty barefoot. On the 3rd day, they did not decrease, but increased! I do not advise anyone to have such a nightmare!!! I would really like to post a photo here to warn others.