There are many causes of excessive phlegm, such as acute respiratory tract infection, chronic respiratory diseases, cardiogenic edema, etc. Choose general treatment or drug treatment after clear diagnosis. 1. Acute respiratory tract infection: Acute respiratory tract infection can cause the phenomenon of phlegm, and even cough, fever and so on. Antibiotic drugs such as cefdinir and amoxicillin can be chosen for treatment, together with the drugs to dissolve phlegm, such as bromhexine and aminoglutethimide. 2. Chronic respiratory diseases: chronic pharyngolaryngitis, chronic bronchitis, bronchial dilatation, etc. can also lead to phlegm phenomenon, daily attention to a light diet, drink more water, avoid spicy and stimulating foods, if the phlegm is more, you can choose Ambroxol hydrochloride to relieve the symptoms. 3. Cardiogenic edema: Acute left heart failure due to sudden increase in pulmonary venous pressure can lead to an increase in pulmonary capillary water pressure, thus leading to alveolar edema, thus showing a lot of sputum. For treatment, cediran and digoxin can be chosen for cardiotonic treatment, together with diuretics, such as furosemide. There are many causes of phlegm, after the symptoms, it is recommended to go to the hospital in time to improve the examination, and follow the doctor’s instructions to take standardized treatment, do not private treatment, so as not to lead to adverse consequences.