Hi...I am a fellow chiarian post op not quite a yr...so u have a bit more time in than myself....but I would ask if u were ever looked at for tethered cord or a syrnx? Either of these can cause issues....plus, have they done a LP on u to see if u r having CSF build up.
A cervical, thoracic and lumbar MRI should have been done......
May I ask how long post op b4 these HA's started......
We have a chiari forum here on Medhelp
http://www.medhelp.org/forums/Chiari-Malformation/show/257 I hope u join us...we have a great group that share info, experiences and support : )
"selma"