Hi and welcome to the Chiari forum.
You said surgery was the only option bcuz of the size?...Not sure what you mean....did she have a syrinx, or a CSF obstruction and any other related conditions?
What are her daily activities? When did she go back to a "normal" routine?
It sounds like there is something more going on....did she have a post op MRI?
I know how scary this can be for any one. I have a few suggestions because I was having this going on this past year also. For 1 I was drinking TOO much water. My kidneys failed back in April working only at 16 percent. The Kidney Dr.. states we should only drink up to 1 liter of water a day.. At least that is what he suggested for me. Also my sodium and potassium was dangerously low so I would suggest getting these checked. You can have this done by a blood test. The possassium was what made me dizzy, I didin't know what day it was I was so confused . So please get these checked. Wishing you the best.
Linda :)