Hello,
I've suffered from TMD for a few years, and have all the symptoms you describe- it started with tightness around the forehead, follwed by tinnitus, inflammation of the jaw and head etc- I often feel 'puffed up', like you have mentioned.
I also suffer from a pronounced metallic taste in my mouth when my TMD flares up (I actually found this forum by typing 'TMD and Metallic Taste' into Google, so that shows that I'm not just making it up).
i find it gets much worse when I've been drinking alcohol.
Regards,
Jeff Maughan