Hi Goodguy, and welcome.
Warts are fed by blood vessels. If you can damage and kill these blood vessels by freezing them, the wart will die. Eventually it will fall off. Liquid nitrogen is cold enough to bring about this localized freezing. We want to restrict the tissue damage to the smallest possible area.
A blister will develop a few hours after freezing the wart. The wart will be raised slightly, redden, and you may feel a slight burning sensation.
Do not break the blister. If the blister breaks, tissue underneath is likely to be re-infected and cause the wart to grow back.
f you freeze the wart just the right amount, a small but visible blister will form. After some number of days, you will notice a reddish tint inside. Slowly the fluid of the blister will be re-absorbed. The blister will change to a darker color. As it dries out the skin will seem a bit thicker.
Resist the temptation to pull off the dead skin. If you do, the wart is more likely to grow back. Even if you always pick your scabs and squeeze your pimples, you can and need to learn to wait in order to be free of your warts. When the dead skin and dried up wart core sloughs off on its own, you will have closed, healthy skin below.
n advantage of this technique is that when done properly, the outer layer of skin is never broken, greatly reducing the infection risk compared to other techniques.
Hope this helps
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