How do I get rid of this particular skin? Which concoction?

I think the healer gets rid of any skin, for a fee

Can you post the link? I can't ever find her: /

Link c: She's in the Sacred Lands somewhere (but I have her bookmarked because I'm lazy~)

The healer is the yellow and white swirly ice cream jiffy pop dome diagonally up-and-left from the Souk that's in the lower right corner. The reason she's not readily findable is that the button for her overlaps that of the souk, so if you roll towards her from the wrong direction, your click doesn't get her but opens the souk instead.