Rhinitis alone does not cause toothache symptoms because of the inflammation of the mucous membrane present in the nasal cavity in this type of disease. However, if the rhinitis is particularly severe and there is a large amount of yellow pus nasal discharge, secondary sinusitis can occur, especially when there is severe inflammation of the maxillary sinuses, which can cause toothache symptoms. It usually needs to be combined with nasal endoscopy, which will find more pus nasal discharge in the middle or lower nasal tract, and sinus CT examination to further confirm the diagnosis. It is recommended to first control the infection with antibiotics, combined with short-term nasal vasoconstrictors to promote ventilation and drainage of the nasal sinuses. If the toothache symptoms are significantly relieved after medication, no further treatment can be given, but if the symptoms do not fully recover after treatment, it is recommended to perform surgical treatment under nasal endoscopy. If the teeth are already loose, tooth extraction can be performed after the sinusitis symptoms have significantly improved.