Lymph node enlargement is usually not visible by laryngoscopy, and only lymphoid follicular hyperplasia in the pharynx can be observed. Patients can check whether there is lymph node enlargement by neck ultrasound, and lymph node enlargement may be caused by local inflammation and infection, or it may be caused by tumor. Since lymph nodes are located in the tissues below the mucosa of the throat or next to the organs, lymph node enlargement cannot be seen through laryngoscopy, but lymphoid follicular hyperplasia can be observed in the throat. If lymphoid follicular hyperplasia occurs in the mucosa of the throat, it indicates that there is a local inflammatory infection, and it may be caused by laryngitis, tonsillitis, and other diseases. If lymph node enlargement is found on neck ultrasound, it may be caused by local inflammatory infection such as pharyngitis, and it may be caused by tumors such as nasopharyngeal carcinoma, laryngeal carcinoma, thyroid carcinoma and so on.