liquid nitrogen to remove sun spots

I went to a derm appt with my very old school doc 2 years ago and was like "can I get rid of this sun spot?" She said "sure", walked out of the room, got a can of liquid nitrogen, and blasted the spot. It turned into a pretty hideous blister for a bit and scabbed but then fell off, and it was and remains completely gone. I don't know the risks because this literally was not even a conversation, but worked extremely well 😆 photo of the before, the after just looks like my face.