My aunty had a few on her face, it was a shock as she always sun smart and was always on us about being smarter.
Just to hang the washing out she had sun cream, hat long shirt ect.
She had 3 cut from her face, like PP said what looked like a small spot resulted in a huge scar.
All she had to do was have them cut out.
It really depends on how early they catch it and if its spread.
I really hope your ex has caught it early and the worst is soon behind you all.
Sending lots of