mid-facial HA usually in the morning as one wakes up from a sleep of teeth grinding



References:
https://books.google.com/books?id=tot78_5FxZwC&pg=PA607&dq=BRUXISM+HEADACHE&hl=en&sa=X&ved=0ahUKEwjgju_Ao8HSAhVlylQKHVuoCzI4ChDoAQhMMAk#v=onepage&q=BRUXISM%20HEADACHE&f=false

http://www.aaom.com/index.php?option=com_content&view=article&id=129:tooth-clenching-or-grinding&catid=22:patient-condition-information&Itemid=120