Cause of pain in cheek?

my Zygoma was broken 10 years ago(the bone was set back in place with out titanium or screws) but i have always had problems with swelling in certain times of year. This year its hard to open my mouth and there is swelling of my gums with shooting pain through the side of my head near the temple. Im finding it hard to eat and missing work. what could be the cause of my continual pain? Oh i recently had an x-ray there were no noticeable problem

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