Cough and fever may not necessarily mean pneumonia, as any illness in the category of cold and flu can cause cough and fever. When should pneumonia be considered? First, fever lasts for more than three days; second, the cough is deepening, and there is obvious phlegm; third, the breathing is faster, and the spirit is not very good; fourth, there is bluish color around the mouth, and the nose is agitated and wheezing; fifth, there are fixed vesicular sounds in the lungs on auscultation. If there are these symptoms, we should consider that there is a high probability of pneumonia. It is important to note that not all pneumonias are characterized by rales, and the diagnosis can be confirmed with the help of imaging tests, such as chest X-ray, if necessary. After the diagnosis of pneumonia, you should follow the advice of the doctor in charge, and should not use or stop medication arbitrarily, as most of the pneumonia can be treated by oral medication.