What are the symptoms of tooth infection?

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Cavities might not be symptomatic in many cases apart from mild to moderate sensitivity. The same cavities if left in place for a longer duration without treatment, then it would go deeper or wider causing trouble. You can expect pain on a particular tooth or generalized pain. In addition ,you can also expect swelling of gums with pus discharge or swelling of face in worst case scenarios. The tooth with any sort of pain has to be looked upon for a root canal therapy initially. Upper back teeth might give you pain simulating sinusitis whereas lower back teeth come along with ear pain.