Feeling a small ball rolling around on the right side of the chin may be enlarged lymph nodes in the neck, submandibular gland tumor or congenital malformation. 1. Feeling a small ball rolling around on the chin is mostly due to enlarged lymph nodes. Enlarged lymph nodes may be formed due to infections, metastasis of malignant tumors, lymphatic tuberculosis and other reasons. (1) Lymph node enlargement may be caused by infections of the head and face, such as tonsillitis, pharyngitis, etc. Fever, headache, etc. may occur during acute attacks, and there will be pressure and pain when touching the enlarged lymph nodes. Lymph node enlargement may also be caused by special infections such as AIDS. (2) Malignant tumors can be transferred to the lymph nodes in the jaw through lymphatic vessels or blood, such as lymphoma manifesting as painless lymph node enlargement. (3) Lymphatic tuberculosis manifests as enlarged lymph nodes with symptoms such as low-grade fever and night sweating (sweating abnormally after going to sleep and stopping after waking up). 2. Tumors of the submandibular gland are rare and may cause pain and difficulty in opening the mouth, in addition to a lump near the chin. 3. If it has been present since childhood, it may also be a congenital malformation. If you experience symptoms, you should go to the hospital for detailed treatment.