I'm in the middle of a five-week treatment for some kind of skin cancer on my chest. It's a topical cream. I have to rub it in twice a day and it burns away a couple of layers of skin over the course of the month taking with it whatever cancerous little nasties were hiding within the epidermis.
I've gone through this treatment once before, but that was a couple of years ago and my vague memories of how unpleasant it was had become vague enough for me to let the dermatologist talk me into another go-around.
Never again. Next time I'll just be taking the blade, thanks very much.
As an indication of just how gnarly this treatment is, below is a photo of the shirt I wore on the first day I applied the cream.