When an elderly person has a prolonged cough, the first step is to have a CT or MRI of the chest. Because of their weak resistance, the elderly are prone to serious respiratory infections, which can lead to a prolonged cough. If the cough does not clear up due to inflammation, you can take anti-inflammatory drugs and cough and phlegm medicines to treat the cough, for example, Lung Power Cough Compound, compound Fresh Bamboo Liqueur, or Niubizi and Serpentine Chuanbei Liquid to relieve cough and phlegm. For more serious infections, intravenous anti-inflammatory drugs such as ceftriaxone, cefoperazone, and levofloxacin should be administered. Another cause may be the occurrence of lung tumors, which can lead to a prolonged cough, especially in the elderly, who are more likely to have lung tumors and need to be admitted to the hospital as soon as possible if medication is not effective.