Symptoms of pain under the chin may be due to temporomandibular joint disorder syndrome, in which pain in the jaw is accompanied by joint popping during chewing movements and impaired jaw movement. It may also be caused by enlarged lymph nodes in the jaw. When the body experiences tumor metastasis, inflammation, or tuberculosis, it may cause reactive hyperplasia of the lymph nodes. If there are signs of granular or bulbous bumps on the chin, it can be considered as a symptom of pain under the chin caused by enlarged lymph nodes in the chin. So this situation should go to the regular hospital in a timely manner, improve the necessary auxiliary examination, after the cause is clear, choose scientific and reasonable treatment methods, so that the symptoms of pain under the chin can be timely and effective improvement.