Dry throat cough with phlegm may be caused by upper respiratory tract infection, acute bronchitis, pneumonia and other diseases. 1. Upper respiratory tract infection: This disease is mainly caused by viral infections such as parainfluenza virus and respiratory syncytial virus, followed by bacterial infections such as hemolytic streptococcus and Haemophilus influenzae. Patients will have symptoms such as dry throat, coughing up phlegm and a small amount of sputum. 2. Acute bronchitis: this disease is caused by infection, common pathogenic microorganisms are coxsackievirus, caramoeba, mycoplasma, etc. It is also related to cold air stimulation, allergen contact and other factors. The main symptoms are irritating dry cough, coughing up phlegm, etc., manifested as a dry throat cough with phlegm. 3. Pneumonia: the occurrence of this disease is related to bacterial and viral infections, which can be transmitted through air inhalation, blood, etc. Patients will have a dry cough, sputum, generalized weakness, loss of appetite and other symptoms. In addition, a dry cough with phlegm in the throat can also be caused by cough variant asthma, bronchiectasis and other diseases. It is recommended that patients with a dry cough and phlegm go to the hospital to get a clear picture of the cause of the disease and cooperate with the doctor for active treatment.