Lymphadenitis caused by toothache requires treatment of the tooth to recover, otherwise it usually does not heal on its own and tends to recur. In general, periapical inflammation of the tooth tends to cause inflammation of the lymph nodes. Periapical periodontitis of teeth is mostly caused by bacterial infection in the pulp cavity. In the acute stage, it often manifests as spontaneous pain, biting pain, and swelling of the gums at the root tip, while in the chronic stage, there are usually no obvious spontaneous symptoms and pus pockets may appear on the gums. Although sometimes lymphadenitis has the illusion of self-healing, when the inflammation of the tooth may be in a chronic phase, if the tooth is not actively treated, the lymphadenitis may still flare up after a period of time. If you have a toothache with lymphadenitis, it is recommended to actively treat the tooth as soon as possible, and if the inflammation is severe, it can be relieved with anti-inflammatory drugs.