It is impossible to determine whether the disease is worsening or improving by the single symptom of coughing with yellow sputum, but if there is a gradual decrease in the amount of sputum, a gradual decrease in the frequency of coughing, and a gradual disappearance of other uncomfortable symptoms, it usually indicates that the disease is almost over. In addition, if the patient changes from coffee-colored or rust-colored sputum to yellow sputum, it usually indicates that the condition is improving. If the patient changes from no sputum or sputum color from white to yellow, it may be related to the existence of long-term smoking and other bad habits of the patient, and usually indicates an aggravation of the disease, mainly related to infections, such as Pseudomonas aeruginosa, Staphylococcus aureus and other pathogens, which can usually be manifested as pneumonia, lung abscess, acute sinusitis, acute bronchitis, acute bronchitis, and in the acute phase of chronic obstructive non-disease. Patients are advised to avoid unauthorized medication, go to the hospital in time, improve the relevant examination, and carry out targeted treatment after clarifying the cause, usually need to use penicillin, cephalosporins and other antibiotics for treatment. During the treatment period, drink more water and pay attention to rest to help the recovery of the disease.