strong medicine

I have a little red spot on my arm which appeared a couple of weeks ago and has grown in size quite a bit since then, so I went to see the doctor yesterday, and she has given me powerful medicine. So powerful, in fact, that it's not even used every day, only a few times a week, and I have to cover the area around the spot with vaseline in order to protect the healthy skin. I couldn't remember what she'd said she thought it was, but looking on the instruction sheet for the cream it mentions actinic keratoses, and calls these precancerous growths. Does that mean that if it weren't treated she thinks it could become cancer? She's not that worried because my white skin says to her that I'm not a sun worshiper, but she doesn't know that I do get a fair amount of sun during the summer, it's just that I turn white again immediately afterward - the sun has very little effect on me, long term.

discussions at work #345876

Me: "I didn't realize who had made those brownies until after I popped that last one in my mouth*. I AM feeling a little sore throaty, now."

TP: "Oh, you think it's fine now, but wait until you start peeing blood!"

Me: "You've been watching too much "House!"

TP: "I love that show!"

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*Our cleaning lady always brings us sweets, which nobody wants to eat when they know she cooked them because we've all seen her level of hygiene.