Many things: Many things. Most commonly dental infections, wisdom tooth problems, gum problems, cysts, tumors, saliva gland problems. If you have such a swelling see an oral surgeon ASAP for exam.
Answered 5/19/2018
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3 doctors weighed in across 2 answers
A doctor has provided 1 answer
A doctor has provided 1 answer
4 doctors weighed in across 3 answers
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