The human body is an extremely complex machine, and it is not an exaggeration to describe the close relationship between various parts of the body as “one hair affects the whole body”. For example, the nasal mucosa is part of the mucosa of the entire respiratory tract, which seems to be insignificant. However, because of the nasal-lung reflex between the nose and the airway, nasal mucosal lesions are often associated with other respiratory diseases: 1. Bronchial asthma A large number of clinical data show that patients with “nasal polyps” have a high incidence of asthma. It has been found that compression of the mucosa of the maxillary sinus with an airbag can trigger an asthma attack, and it is therefore believed that the rhinopulmonary reflex is involved in this mechanism. Histopathologically, both are characterized by mucosal edema and eosinophilic infiltration. Previously, it was believed that the pathogenesis of asthma was based on bronchial smooth muscle dysfunction, but now, according to a large number of histopathologic and immunopathologic studies, it has been confirmed that the inflammatory response of the bronchial mucosa is the main pathological basis of asthma, thus leading to a shift in the focus of asthma treatment. The pathologic process of nasal polyp development is essentially identical to that of asthma, and thus the two are closely intrinsically related. 2. Aspirin triad Patients with aspirin triad present with aspirin allergy, “nasal polyps” and asthma. 3. Congenital anomalies of the respiratory mucosa These diseases include cystic fibrosis and immobile cilia syndrome. 4. Hypertension “Nasal polyps” are a predisposing factor to hypertension, and like sleep apnea syndrome, chronic nasal congestion caused by nasal polyps can predispose to hypertension.