So today me and my girlfriend were play fight and she pulled the hair on the backside of my head, she didn't pull it very hard so as she let go I had this intense pain in my head and then after a couple of seconds it felt numb for about a minute. I would like to find out what this is and to note that I have like a small crater like hole in the backside of my head but I had cat scans when I was a kid to see what it was but it was nothing and I am 17 right now. Thank you.