submandibular lymphadenopathy refers to the swelling of lymph nodes located beneath the jaw, specifically in the submandibular region. This condition often occurs in response to infections, inflammation, or other medical issues affecting the head and neck area. Common causes include viral or bacterial infections, such as strep throat or mononucleosis, as well as dental problems like tooth abscesses. While it can be a sign of a minor issue, persistent or severe swelling may require medical evaluation to rule out more serious conditions.