As Vini stated, all cases are different. I would check with your medical professionals.

For what its worth, I recently traveled during the Thanksgiving holiday. I had some issues. First, I am very light and noise sensitive -- so you can imagine my distress. I used earplugs and sunglasses. Also, TSA allowed me to use the "disability" line so it made the screening process much easier. I also had priority seating. The change in cabin pressure (both climb-out and descent) gave me serious headaches -- so you need to be prepared just in case.

I hope this helps. Remember each case is different. I am at 16 mos post concussion.

Best wishes,