My Wife Was Diagnosed Chiari 5mm She Has Had Headaches

My wife was diagnosed chiari 5mm she has had headaches that have lasted for 44 days at times extreme back pain but mri doesn't show anything wrong with back she loses her balance and is falling a lot lately. But the last nueorolist we went to said nothing is wrong with her but our family doctor says that they just look at what the book say to do and that we are now gonna be seeing neurosurgeon her niece has this also and has had the surgery.