Wow I did not know that a LP could cause Chiari. I had a LP in 2007 when I had a brain bleed. After the LP everything went south for me. Of course the ED doctor failed to do an opening pressure. Later my Neurologist wanted me to do a repeat LP. I told him so sad to bad , but I was not going to volunteer for another one unless it was a medical emergency. After the LP I could not sit up right for weeks and I was left with a headache that lasted nine months. None of the stupid doctors could find the source of the bleed or decide if they should do a blood patch. Now I know that the bleed and all the complications were because of EDS. Still I can’t believe that not a one of them could figure it out.