Cough and phlegm need to see the respiratory medicine, cough and phlegm may be acute respiratory tract infections, such as acute bronchitis, acute bronchitis patients often manifested cough, can also be manifested as coughing sputum, and sometimes coughing purulent sputum. There is also pneumonia, which can present with symptoms related to coughing, coughing up purulent sputum, and high fever. Cough and sputum can also be seen in tuberculosis, which is often accompanied by low afternoon fever, hot flashes, night sweats and other related symptoms. Cough with sputum can also be seen in lung cancer, in which patients may not only cough up sputum, but also have blood in sputum. Cough and sputum can also be seen in chronic obstructive pulmonary disease (COPD), which is often accompanied by dyspnea. Cough and sputum can also be seen in bronchiectasis, bronchiectasis can be manifested as coughing, coughing up purulent sputum, hemoptysis, and severe bronchiectasis can also be accompanied by dyspnea.