Hi I had decompression of my Arnold chiari, in Dec 2013. Post op mri showed a pseudomenigocele. In March this year I started having the headaches again and numbness in hands and at times when headaches are bad I get pupillary changes, my right pupil is a size or 2 above the left. I had another mi which showed no change and my N S said if the symptoms are un manageable he would do a shunt as last resort.For the last 5 weeks I ve had vertigo and nausea, the dizziness occurs and goes quickly but is only over the right side. Nausea is constant heightened by turning my neck sideways. I m in constant pain and its worse of a night. It s at the site of my scar and is very deep seated. Also I feel foggy and forgetful and my concentration is awful. Friends and family although their kind their running out of sympathy.