Permanent Hyperpigmentation

Permanent scarring or hyper / hypo treatment of liquid nitrogen is very rare. It is a theoretical risk, and varies depending on skin type, but it is very unusual.

and I had a wart removed from my lips when I was three years (I can not Tremembed how, I was knocked out) and I've certainly had a scar ...

It probably depends on the sensitivity of the skin.

I had and have no scars at all.

No, not I had one when I was younger on the bottom of my foot and there is nothing.