Friend's lionfish is sick - please help!

Hi folks, one of my friends asked me for help with her sick lionfish so
I'm posting her questions/concerns here. I also posted earlier to
r.a.m.misc and it was suggested that I cross-post here. Thank you very
much for your help!

"She hasn`t eaten in like probably more then 2 weeks refuses any food
even live food which I don`t feed her normally but I was trying to
intice her. She has been of late swimming in small circles and now is
doing that upside down. If I sit with her she`ll sit next to me though.
She`s a Momma`s girl. Tonight it looked as though a sore has started on
her lip it wasn`t there this morning."

"all ammonia nitate and nitrite is 0. Ph is 8.2 Hardness and alkenlity
are fine. I`m starting to think it`s my neighbors and their damn band
practice!"

Additional info: she says it is a Volitan lionfish. She also recently
lost a 3 yr old fuzzy dwarf.

If you have any idea what's wrong and/or can suggest a course of action,
please e-mail me or respond here. Thanks again everybody!

-Matt