Enlarged lymph nodes in the submandibular area are mainly seen when the inflammation in the area of drainage cannot be relieved, such as inflammation of the head and face, inflammation of the mouth, inflammation of the throat, and if the inflammation persists, it can lead to persistent lymph node enlargement. Because there is no progression of the disease for many years, most cases are benign, but there are rare cases of lymph node metastases caused by tumors that progress more slowly. In order to clarify what exactly is causing the swollen lymph nodes you can go to the hospital further and your doctor may prescribe appropriate tests such as lymph node ultrasound and, if necessary, lymph node biopsy and pathology.