A meatball inside the jaw that can move may be caused by enlarged lymph nodes in the jaw or abnormal fat accumulation. 1. Generally, when virus or bacteria enter the lymph nodes with lymphatic fluid, it will cause pain and enlargement of lymph nodes. Diseases that can cause enlarged lymph nodes in the jaw include tonsillitis, gingivitis, acute pharyngitis, otitis media, and other inflammatory diseases in the oral and maxillofacial region, and if the treatment is untimely, it may also cause weakness of the limbs, fever, and symptoms of poor mental health. 2. If you live an irregular life for a long time, do not have good living habits, or do not exercise, there may be fat accumulation in the neck, and if it is abnormal fat accumulation, it will lead to the appearance of removable meatballs in the lower jaw, it is recommended that you can strengthen the exercise, improve the living habits and other ways to alleviate the problem, and if necessary, it is also necessary to go to the hospital, ultrasound examination, etc., to make a clear diagnosis, to prevent the occurrence of missed diagnosis. 3. In addition, if you suffer from malignant tumors, it will also lead to the appearance of the above situation, it is recommended not to take it lightly, and go to the hospital for examination and treatment in a timely manner.