There are more causes of phlegm, so the treatment of phlegm is also different. Small remedies are generally not based on science, so they are not recommended. Diseases of the respiratory system such as chronic bronchitis, bronchiectasis, pneumonia, etc. can cause excessive phlegm. Back patting, nebulized inhalation of saline can be given to promote phlegm expulsion, and if necessary, sputum-cleansing drugs such as ambroxol hydrochloride and anti-infective drugs such as penicillin can be used (when there is a clear bacterial infection). Excessive sputum can also be seen in cardiovascular diseases, such as left heart failure. The most important part of the treatment is to treat the primary disease, cardiotonic agents such as digitalis, diuretics such as thiazides, to improve the heart failure, pulmonary stasis is reduced, sputum production will be reduced. Environmental factors can also cause an increase in sputum, such as inhalation of harmful gases such as sulfur dioxide, harmful soot. The main treatment is to stay away from the polluted environment, drink more water and develop good sputum elimination habits. Excessive phlegm can also be seen in a variety of other diseases, which need to be diagnosed and treated by a doctor in a timely manner. The above medications should be used under the supervision of a physician.