The condition of rhinitis may lead to olfactory failure. All types of rhinitis may lead to a certain degree of congestion, swelling or edema in the mucosa of the nasal cavity, causing an increase in the patient’s respiratory ventilation resistance, resulting in nasal congestion. At the same time, the obstructive factors in the nasal cavity may also cause the odor particles outside to be difficult to be smoothly transmitted to the olfactory mucosa area, and difficult to be perceived by the olfactory nerve, which may cause different degrees of olfactory decline, or even near complete loss of smell. If the patient’s rhinitis condition is well treated and improved, the nasal ventilation is also well improved, and the odor particles can be smoothly uploaded, the olfactory decline will often be better improved. Some patients with acute rhinitis may suffer from necrosis of the olfactory nerve due to viral infection, which may lead to permanent loss of sense of smell.