I get this pressure in my head for no clear reason, but it feels like my head is going to explode. There is not always pain with the pressure. Many times this happen when I stand up and start to walk. I have to stop walking and wait for several minutes for it to pass. I have also experiencing blurred vision but somtimes its only blurry spots. I had a spinal tap a year and a half ago (they were testing for MS) I do remember that they said my opening pressure was fine. Is there any one test for this?