Possible causes of pain at the junction of chin and neck include enlarged lymph nodes in the neck, thyroiditis, temporomandibular joint disorder syndrome and so on. 1. swollen lymph nodes in the neck: swollen lymph nodes in the neck are often caused by inflammation, tissue cell proliferation, tumors, etc., which may cause pain when pressed at the junction of the chin and neck. 2. Thyroiditis: thyroiditis is mostly caused by autoimmunity, viral infection, bacterial or fungal infection, etc., which leads to the destruction of thyroid follicle structure and inflammation, resulting in the enlargement of the thyroid gland, which leads to the appearance of the phenomenon. 3. Temporomandibular Joint Disorder Syndrome (TMJDS): TMJDS may be caused by intra- and extra-articular trauma, overloading of the temporomandibular joints, poor occlusion, autoimmunity, bad habits, etc., which leads to pain in the temporomandibular joint area, muscular pain, and tenderness, and thus the phenomenon appears. There may be other reasons for the pain at the junction of the jaw and neck, it is recommended to go to the regular hospital in time, complete the relevant examinations, clarify the cause of the disease, and then give targeted treatment or treatment under the guidance of the doctor.