The typical duration of treatment required for acute pneumonia is 5 or 7 to 10 days. The treatment course of acute pneumonia is complicated, the general population, young adults, pneumonia antibacterial drugs for the treatment course of at least 5 days, most patients need 7 ~ 10 days or longer course of treatment. After the patient’s body temperature returns to normal for 48~72h, his/her symptoms such as cough and sputum in the lungs will also be significantly relieved, and he/she can start to discontinue the use of antimicrobial drugs. However, there are too many uncertainties in the patient’s acute pneumonia, and the exact duration of treatment needs to be determined by a number of factors. The duration of treatment for acute pneumonia is related to the severity of the patient’s pneumonia. Other factors affecting the duration of treatment include age, underlying disease and complications, and whether the bacteria are drug-resistant. The older the patient is, the more underlying diseases he or she has, the weaker his or her organ reserve function is, the greater the chance of complications, and the longer the duration of treatment. If the infection is caused by drug-resistant bacteria, it will be more difficult to treat. It is recommended that patients with acute pneumonia consult a doctor promptly and follow the doctor’s instructions for active treatment.