I am 5 years late to the post but I only just signed up! So, I have only 1 cerebellar tonsil that is protruding into the foramen magnum,apparantly its only at 3mm and therefore I do not have Chiari. Is this tru? can anyone help? I have had a headache for literally 16 years without a second that goes by without feeling ill. 16 years ago when i started to get symptoms everything pointed to Chiari so I went to get MRI etc and suggested I had this (i was niave back then and should of played it down) Ok so all they found was disc bulge at c5/c6, 30grand later of my own money still no diagnosis. I revisited my notes and discovered they found the above but they said had no relevance, this was on the radiologist report and was not even mentioned when i went to see the neuro after the MRI. They said it was quite normal and was not significant and thatb I didn’t have Chiari. Surely it has to be Chiari? I have had litreally every test done you can imagine, all paid for by myself because the GPs and other professionals say its pyshological… really! By the way I am not rich, I decided to work for myself, grafted hard with a headache and dizzy, general unwell feeling to save the money to try to get fixed. 16 years on still feel like shit! Help please?