Cough caused by cold, the common causative agents include the following: a. viruses, patients with fever, headache and other symptoms, blood tests suggest normal or lower than normal white blood cells, increased or reduced lymphocytes, increased monocytes, normal C-reactive protein, calcitoninogen, symptomatic treatment oral compound licorice tablets or oral Qingkai Ling, Pudilan, etc.. Bacterial infection, often accompanied by coughing, coughing yellow sputum, blood routine often indicates that the white blood cells are higher than normal, C-reactive protein, calcitoninogen will appear increased, oral antibiotics can be used for treatment, such as amoxicillin, cefixime, etc., if necessary, take intravenous infusion treatment. Third, atypical pathogenic bacterial infections, such as mycoplasma infection, chlamydia infection, can be oral azithromycin, erythromycin or levofloxacin, moxifloxacin, etc.