I'm not sure my link to the Johns Hopkins patient handout works (I'm too new to be allowed to post links ), so I'll try to paste some of it below:

**copyright -  2006 Jason Rosenberg, MD


There are various scientific journals that reference the misdiagnosis of migraine symptoms after a head bump or sudden movement as concussion. I'll reiterate that Dr. Kutcher told me this is actually super common, but most doctors just don't diagnose it correctly.