What Causes the Submental Node to Swell?

Swelling at the submental node is often a sign of disease and can be caused by numerous factors like an infected wisdom tooth, oral cancer, a tooth abscess, oral infections, lymphadenopathy, leukemia, lymphoma, swollen lymph nodes and may also be a result of metastasis of cancer, as reported by Right Diagnosis. The submental nodes are a part of the lymph immune system, and are situated right below the chin. These nodes are responsible for fighting off infections with the white blood cells that they contain and acting as a filter for removing potentially pathogenic microbial agents from the lymphatic system, so that it cannot be distributed throughout the body.