Inflammation of the chin lymph nodes is often caused by oral and nasopharyngeal infections and thyroid diseases of the neck and infectious diseases of the chest, as follows: 1. Gingivitis of the oral cavity and nasopharynx, etc.: closely related to bacterial or viral infections, the clinical manifestations are swollen chin lymph nodes, which can be accompanied by redness, swelling and painful symptoms in severe cases. Treatment is mainly directed at the primary disease, using antibiotics or antiviral drugs, and generally the swollen lymph nodes in the chin can be relieved or disappear in a week or so. 2. Thyroid diseases in the neck: such as subacute thyroiditis or thyroid malignant tumor causing lymph node metastasis, mainly directed at the primary disease, subacute thyroiditis is usually treated with hormonal drugs, and thyroid malignant tumor is usually also 3. Infectious diseases of the chest: especially tuberculosis, which usually requires anti-tuberculosis medication in case of lymph node tuberculosis in the neck.