I have a 14mm chiari , I've had problems with tiredness, tinnitus, balance, gait, headaches etc since childhood, misdiagnosed with everything from ME to meniers.
For almost 2
years I have had typical and atypical trigeminal neuralgia
, it affects all 3 branches of the nerve.
My MRI picked up the chiari and showed the cerebellar artery was touching the trigeminal nerve and probably causing the problem.