Patients can smell odor after sneezing, often because of acute and chronic inflammatory factors in the nasal cavity and sinuses, and may also be the presence of foreign bodies, tumor proliferation, as follows: 1, inflammatory factors: patients may accumulate some inflammatory purulent secretions in the nasal tract, after a longer period of time, it is easy to produce the symptoms of odor, odor feeling. 2, the presence of foreign bodies: some patients may be the presence of foreign bodies in the nasal cavity 3, the presence of tumor growths: some patients may have various benign and malignant tumor growths in the nasal cavity and sinus area, which may also lead to odor symptoms. Therefore, patients with obvious nasal odor need further nasal endoscopy and nasal imaging to determine the condition of the disease.