In recent years, Mycoplasma pneumoniae infection has become epidemic. Parents are relatively more knowledgeable about bacteria and viruses, but feel unfamiliar and frightened by the sudden onset of mycoplasma. 1, in children, the most common site of attack of mycoplasma is the respiratory tract, triggering pneumonia; 2, mainly in school-age children; 3, repeated high fever; 4, irritating cough, mostly dry cough at the beginning, coughing more violent; 5, symptoms and signs do not match, most children initially lung auscultation is not obvious large 6, the performance of the chest X-ray shows diversity: large, scattered patch-like, wandering; 7, there can be other extra-pulmonary manifestations The clinical confirmation of the diagnosis is mainly made by antibodies to mycoplasma in the blood. Although pneumonia caused by this pathogen takes longer to treat, parents should not be overly concerned, and most of the macrolides (e.g. erythromycin, azithromycin) are applied with better results.