Pneumonia repeated coughing for a month may be due to strong virulence of pathogenic bacteria, weak body immunity, improper treatment and so on. 1. Strong virulence of pathogenic bacteria: If the virulence of infected pathogenic bacteria is relatively strong, such as yellow staphylococcus, Klebsiella pneumoniae, etc., the course of the disease is recurrent and prolonged, and a persistent cough will occur. 2. Weak body immunity: If the pneumonia appears in the elderly, the existence of their own underlying diseases, such as chronic bronchitis, emphysema, etc., or the body immunodeficiency of the people, will be due to the low capacity of the immune cells caused by repeated cough. 3. Improper treatment: If the choice of drugs is not appropriate, the pathogenic bacteria are not sensitive to the use of drugs, the treatment will be ineffective, or because it is not yet cured that is to stop the drug, there will also be recurrent cough. Pneumonia recurrent cough for a month may have other reasons, should be timely to the hospital, by the doctor through the drug sensitivity test, etc., choose the appropriate treatment program, to avoid delaying the disease.