I am a 15 year old male who has had a brain surgery where there is a tumor blocking the passage of CFS fluid between the third and fourth ventricle. They could not remove the tumor so instead they put a hole under it to allow the CFS fluid flow. This was causing major headechs due to the build up. I am not sure if this has anything to do with why I feel my brain move when I move. For example, when I move both my feet, I feel a "flex" in my brain. Around on cm above the left eyebrow, and one cm back. My legs are around the same, just a bit more to the left. I have just found out that this is not normal, and my parents couldn't care less, so I am looking for help and answers as to is this dangerous, should I be seeking medical assistence, or if I should just leave it alone.