Pneumonia cannot be diagnosed solely on the basis of how long it takes to cough, but can be diagnosed through clinical symptoms, auscultation, blood tests, chest CT, and pathogen testing. 1. Clinical symptoms: cough, sputum, high fever, chest tightness and other clinical symptoms. 2. Auscultation: Lungs with or without blistering sounds, wheezing sounds, or tubular breathing. 3. Blood test: blood test shows that the white blood cells are more than 10×10∧9/L or less than 4×10∧9/L. 4. 4. Chest CT: There is a large infiltrating shadow on the chest CT imaging film. 5. Pathogen test: The test on the coughed up sputum can understand its sputum bacteria, fungi, antacids and so on, which can help to understand the type of pneumonia and make a correct judgment for the treatment. In addition, cough can also be common without colds, acute pharyngitis, chronic bronchitis, emphysema and other diseases. If you have symptoms of coughing, consult a doctor in time to find out the cause and treat the cause to avoid aggravating the condition. Pay attention to more rest, drink more warm water, follow the doctor’s instructions, take medication on time.