Cough due to infection in both lungs and flocculent shadows detected on imaging should be treated in a standardized manner. It can be treated by anti-infection, cough and sputum relief, and supportive therapy. 1. Anti-infection: If sputum culture results are available, treatment can be directed against pathogenic microorganisms. If there is no sputum culture result, it can be treated empirically. If it is caused by bacterial infection, cefixime can be used to fight infection; if it is caused by mycoplasma infection, levofloxacin can be used to fight infection; if it is caused by viral infection, ribavirin and other antiviral treatment can be used. 2. Cough and phlegm: If cough and phlegm symptoms are serious, oral aminobromine hydrochloride and bromhexine can be given to resolve phlegm, and acetylcysteine nebulizer can be used to dispel phlegm if necessary. 3. Supportive therapy: patients should pay attention to rest, supplement protein, calories and vitamins, closely monitor the condition, if the body temperature is too high, should be given antipyretic and analgesic drugs such as acetaminophen and other drugs to reduce fever; After lung infection, patients should follow the doctor’s instructions to actively treat the disease and at the same time do a good job of self-health monitoring, and give timely feedback to the doctor if they feel unwell.