Cynthia, I hope this is the case for your mom too. My wallpaper paste was just about continuous and many nights I could not sleep for having to wipe out my mouth. I felt like I was drowning. I would rate this as much worse than even the radiation burns to my neck and face. I will say that it did taper off to some extent before ending, so it wasn't a complete instantaneous reversal. Please tell your mom there IS an end to it, and the end appears to be sooner rather than later.
Joanna