keratosis
"I am on week 5.  I first used it on my arms with no result.  So I decided to do my forehead. A few spots came out.  Now I'm doing my chest area...major sun damage! I'm not going to lie, it itches and burns.  If all these spots are pre-cancer cells, then its definitely worth a few weeks of pain and discomfort! I just told my co-workers what I was doing so I didn't feel the need to "cover-up".  Actually feels better not to have clothes rub on it.  I take Advil for the pain.  If only I could go back in time and tell myself to get out of the tanning beds, its not worth it!"