Nurse practicioner treated several pre-cancerous spots with liquid nitrogen. I don't remember in the past having so many scabs a few days later, but if they drop off, no big deal. I think the nurse could have been a little more forceful in recommending treatment of my warts. After reading the take home materials, I think I would have opted for treatment rather than none. My wife seems to agree. Overall, though, it was a good experience.