Neck pain below the chin may be related to neck muscle injury and swollen lymph nodes in the neck. 1. Neck muscle injury: both sides of the neck below the chin are covered with abundant muscle tissues, when various reasons cause muscle injury on both sides of the neck, it may lead to neck pain, for example, aseptic inflammation of sternocleidomastoid muscle will cause local myofascial oedema, leading to pain; congenital strabismus will lead to tension and spasm of sternocleidomastoid muscle, and the above mentioned symptom may also occur. 2. Enlarged lymph nodes in the neck: there are abundant lymph nodes in the neck below the chin, when the lymph nodes are enlarged, they may compress the surrounding nerve roots, resulting in pain symptoms. For example, inflammation in the oral cavity, ear, nose and throat may lead to the emergence of cervical lymphadenitis, resulting in pain symptoms. When a malignant tumor develops neck lymph node metastasis, it may also lead to the enlargement of neck lymph nodes and the symptoms mentioned above. There may be other reasons for neck pain below the chin, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, and then give targeted treatment or therapy under the guidance of the doctor.