Patient: Description of condition (onset, main symptoms, hospital visited, etc.): My son is 7 years old and had a relapse four years ago, treated for more than a month, his symptoms were mostly cough and no phlegm. But in July this year, he relapsed again. The effect of treatment for more than a month was not satisfactory, and he stopped coughing again for 3-4 days after stopping the injection. The treatment of mycoplasma pneumonia is based on the severity of the disease and various clinical manifestations.