Cough has a late onset in the course of a cold, but it is not necessarily the last step. Because the condition may worsen and develop into acute bronchitis or pneumonia if it is not well controlled after a cold, patients may develop clinical symptoms such as coughing yellow sputum and fever. In order to avoid the aggravation of the cold, it is necessary to pay attention to rest after the diagnosis of the cold, avoid getting cold, and give symptomatic treatment according to the clinical symptoms, for example, if the patient has a fever, medication can be given to reduce the fever or physical cooling according to the body temperature, and if the patient has a strong cough, oral cough medicine can be given, etc.