I'm 16 and am active in multiple contact sports. I have accumulated 2 concussions this year bc of these sports. (football namely) It seems like ever since I recieved the first one i have moments where i have this uncontrollable urge to pop my neck, and kind of turn my heads back and forth. Even now as I'm writing this I have done this act repeatedly. I don't know what it is and I'm really curious as to how I can stop it.