It just started this morning, but last night could taste a wierd brief taste in that part of my mouth...today, I woke up and it's extremely swollen and sensitive to the touch from there in a line to my teeth. Is this an allergy?
You need to have a dentist examine this condition immediately. An Email Diagnosis is impossible from the sketchy details you have relayed. Your dentist can examine this area and gather other diagnostic clues from X-rays and lab tests. Do yourself the favor of obtaining dental professional attention within an urgent time frame. This could get worse very quickly if you ignore or trivialize its importance.
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