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Published on: 7/21/2026
What could cause sore, swollen lymph nodes under the jaw?
Swollen lymph nodes under the jaw, medically known as submandibular lymphadenopathy, occur when these small, bean-shaped glands become enlarged as your immune system responds to a threat. Common causes include:
- Infections: Colds, flu, strep throat, dental infections, tonsillitis, and mononucleosis
- Skin conditions: Cuts, abscesses, or infected wounds near the jaw
- Autoimmune disorders: Lupus or rheumatoid arthritis
- Cancers: Lymphoma or head and neck cancers (less common)
Most cases resolve on their own within 2–3 weeks, but persistent, hard, or painless swelling warrants medical evaluation.
Because swollen lymph nodes can signal anything from a minor infection to a condition requiring prompt care, identifying the likely cause early can save you time, worry, and unnecessary appointments. Take a free, instant, online symptom check to get personalized insights based on your specific symptoms and clear guidance on your next steps.
Reviewed for medical accuracy: 07/20/2026
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Swollen lymph nodes under the jaw, also known as submandibular swelling, can be caused by different health conditions. According to the references provided, one potential cause is an infection, which can lead to swelling in this area as the body fights off germs. Another possible cause is a condition called torus mandibularis, which is a bony growth in the mouth that can sometimes be mistaken for other issues. Additionally, submandibular swelling could be an early sign of more serious conditions, though those are less common.
Here are some possible causes of swollen lymph nodes under the jaw:
- Infections: These can include bacterial or viral infections that the body is trying to fight off.
- Torus Mandibularis: This is a bony growth that might be noticed under the jaw.
- Other Conditions: Sometimes, swelling might be an early sign of other health issues, though this is less common.
If you notice swelling under your jaw, it is important to consider these possibilities. To help identify what might be causing your symptoms, you can use this free AI symptom checker for personalized insights, and seek medical advice if needed to ensure proper diagnosis and treatment.
(References)
Eleftheriadis I, Papadimitriou P, & Tzelepi H. (1990). [Submandibular swelling and its differential diagnosis]. To Helleniko periodiko gia stomatike & gnathoprosopike cheirourgike, 2130058.
Shaver TB, & Joshi AS. (2023). Torus mandibularis and its implication as a risk factor for .... BMJ case reports, 36805874.
Ruiz-Masera JJ, Alamillos-Granados FJ, Dean-Ferrer A, Pérez-Seoane C, Modelo-Pérez A, Morillo-Sánchez A, & Sierra-Prefasi R. (1995). Submandibular swelling as the first manifestation of giant .... Journal of cranio-maxillo-facial surgery : official publication of the European Association for Cranio-Maxillo-Facial Surgery, 7790505.
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