Some of the most disturbing creations were accidental. Whilst working on a panacea, a truly horrifying torture pill was created. It most definitely heals, however it heals what it considers to be an injury. This includes any skin opening. Quite a few of which are necessary for humans.
Imagine slowly seeing your vision disappear because skin started growing over it. Or feel how your nose gets plugged. Although the process is slow, you don't need to worry about dying for as long as the pill doesn't wear off. It'll only last a week...
Surgery will basically need to be constantly performed if you want a chance at survival and death isn't an option before the week ends.