Rhinitis patients with dry mouth is mostly caused by nasal congestion with open mouth breathing, which can be seen in chronic hypertrophic rhinitis and allergic rhinitis. 1. Chronic hypertrophic rhinitis is a chronic inflammatory disease of the nasal mucosa caused by repeated episodes of acute rhinitis and reflux pharyngitis, etc. There are pathological changes such as congestion, swelling, exudation or hyperplasia of the nasal mucosa, which leads to open-mouth breathing. 2. When allergic rhinitis, the nasal mucosa is pale and edematous, causing nasal itching, sneezing, nasal discharge, as well as nasal congestion and other manifestations, in which the nasal congestion is intermittent or persistent, and there can be bilateral nasal congestion, especially at night, the vagus nerve is excited, the symptoms of nasal congestion aggravated, there can be open-mouthed breathing, which leads to dry mouth. Those who are diagnosed with rhinitis causing dry mouth and tongue should standardize the treatment after the doctor clarifies the diagnosis and condition.