The causes of neck and chin swelling and tightness include enlarged lymph nodes, neck muscle spasm, cervical spondylosis and so on. 1. Lymphadenitis or tonsillitis: the infection of lymph nodes or tonsils caused by bacterial infection, which causes congestion and edema, and may also cause lymph nodes below the neck to swell, so you will feel the neck and chin always swollen and tight. 2. Neck muscle spasm: such as due to improper sleeping position or neck cold, etc. caused by falling pillow, will cause neck muscle stiffness, thus feeling neck swelling, tightness. 3. Cervical spondylosis: When cervical spondylosis causes neurological symptoms, it may reflexively cause abnormal sensations in the neck under the chin. In addition to the above reasons, trauma, cervical spine hyperplasia, brain space-occupying lesions and other diseases may also cause the above symptoms. 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.