Rhinitis causes bad breath, clinically there are mainly the following reasons: 1, rhinitis itself will have a large amount of secretions oozing out, especially containing protein components, easy to be in the nasal cavity in the vesicant, corruption, become the source of odor, because the nasal cavity and the oropharyngeal cavity is connected, when the patient inhales, the odor is inhaled into the oral cavity, resulting in patients with bad breath. 2, patients with rhinitis, there is often a backward flow of nasal mucus into the oropharynx, the backward flow of the Nasal snot is easy to induce an inflammatory reaction in the oropharynx, such as the formation of pharyngitis, once the formation of pharyngitis, it is also easy to lead to the oral cavity halitosis performance. Rhinitis patients lead to halitosis, it is recommended that patients actively treat rhinitis, you can apply nasal spray hormone, oral rhinitis drugs, perfect nasal irrigation and other treatments to promote the recovery of rhinitis as soon as possible, for the case of pharyngitis, you can apply pharyngitis into the oral solution, improve the oropharyngeal nebulization and other symptomatic treatment treatment to alleviate the symptoms. There are many reasons for bad breath, patients with dental disease, inflammatory infection of the lungs and airways or inflammatory infection in the stomach, are also prone to bad breath, for rhinitis induced bad breath, we should look for the causes to give a multi-faceted treatment.