The problem of phlegm on the lungs is relatively widespread. For example, in patients with rhinitis and sinusitis, secretions from the nasal cavity flow to the back wall of the pharynx, and coughing and coughing can occur after stimulating the back wall of the pharynx. Diseases of the pharynx, such as pharyngitis, tonsillitis, tuberculosis of the pharynx and throat, and tumors of the pharynx, sometimes combined with bacterial infections, can also cause coughing and sputum, which can develop in the pharynx and downward, affecting the trachea and bronchi and causing corresponding lesions, such as acute or chronic bronchitis, which can cause coughing and sputum. There are many diseases of the lungs, such as pneumonia with inflammation of the lungs, lung infection, bronchitis of the lungs, tuberculosis, tumors of the lungs, and other causes that can cause coughing and coughing. In addition to respiratory system lesions that can cause coughing and coughing, lesions in other organs can also cause coughing and coughing accordingly, such as heart failure in heart disease that causes pulmonary edema, which can also cause coughing and coughing. Coughing and coughing can be caused by unknown reasons, for example, some people take long-term antihypertensive drugs, such as Enalapril, which can also cause coughing and coughing symptoms. Gastroesophageal reflux disease and other stomach diseases cause increased gastric pressure and reflux, which may cause coughing and coughing of phlegm.