If the chest feels phlegm can not be coughed up, expectorant drugs can be used, such as ambroxol, eucalyptus pinellia enteric soft capsule or acetylcysteine, and it is recommended that the patient actively seek medical attention, improve the blood routine, C-reactive protein, chest radiographs and other related examinations, to further clarify the diagnosis and assess the possible infection of the causative organisms. If the patient’s leukocytes showed significant elevation, neutrophils, neutrophil percentage, C-reactive protein increase, clinical consideration for bacterial infection, need to be treated with antibiotics, for example, commonly used antibiotics including cefixime, amoxicillin, azithromycin, levofloxacin and so on. If the patient’s mycoplasma antibody has more than four-fold elevation in the recent past, the clinical consideration is mycoplasma infection, which requires the use of macrolide antibiotics or quinolone antibiotics.