A cough with sputum for a month is often associated with a serious infection of the respiratory system, and is more common in the lower respiratory tract. In case of bronchitis or pneumonia, which may cause a longer cough, it is best to have a sputum culture and drug sensitivity test, and according to the infection, choose a suitable and sensitive antibiotic for anti-inflammatory treatment, as well as cough and expectorant medications, such as Pulmonary Power Cough Compound, or Niubizi and Serpentine and Chuanbei Liquid, or Compound Fresh Bamboo Li Liquid for cough and phlegm treatment. In the case of severe bronchiectasis and lung cancer with secondary infection and long cough with sputum, targeted treatment should be given for the primary cause, such as bronchiectasis, which requires intravenous drip treatment with anti-inflammatory drugs in the acute stage, and lung cancer, which should be treated with surgery as soon as possible.