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The thing that's bothering me is that no matter what other things I try around anger (attitude-wise, intellectually, emotionally, physical expession) or my jaw (physio), this physical sensation just seems to persist, so I'm not sure what to do with it. Do you have any ideas? 
Perhaps it's not anger related, so no matter how much anger you look at you won't find it?
That could be! I'll have another think soon
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Well, I do have a guess as to what my tense jaw is about -- namely that it's a way for my body to ensure I don't get loud and/or angry -- but I was hoping Focusing might help me verify or falsify that theory.