Asthma patients have more sputum mainly due to the following reasons: 1, asthma patients can have increased secretions due to the presence of chronic inflammation of the airways, patients show coughing and coughing, secretions from the upper and lower airways, because of increased airway secretions and increased sputum; 2, some patients have edema in the airways and pharynx due to poor control of asthma, secondary to respiratory tract infection, purulent secretions, which make sputum increase; 3. Most asthma patients with combined rhinitis and sinusitis can develop reflux of secretions in the nasal cavity, resulting in increased sputum. In addition to controlling asthma, these patients also need to control allergic rhinitis and can use nasal sprays to control nasal inflammation and improve cough and sputum symptoms. Some patients with asthma may have acute asthma attacks due to recurrent allergic rhinitis, and poor control of rhinitis can affect the effect of asthma treatment and lead to poor asthma control, so patients with more sputum need to consider whether it is caused by asthma or by poor control of rhinitis.