Finally a diagnosis and D3 update in General Board Posted August 21, 2019 @CHfather I totally agree it’s easy to get side tracked or forget to ask or tell a doc something when you are finally getting answers when you’ve been suffering. I didn’t know it was mandatory for a Dx of HC. I only know a little bit about the non CH TACs. We didn’t even covered all the TACs in PA school or on my board reviews. Only CH was briefly mentioned and most of the time on HA was spent on migraines.