1.What is Mycoplasma pneumoniae? Mycoplasma pneumoniae, also a pathogenic microorganism, is neither a bacterium nor a virus, its size is between bacteria and viruses, and it has no cell wall. It is invisible to the naked eye. 2.How is Mycoplasma pneumoniae infected? It is transmitted through respiratory droplets and has a high incidence in children over 3 years of age, especially in kindergarten and elementary school children, where the chance of transmission among them is quite high. In recent years, the incidence of Mycoplasma pneumoniae in infants and young children has been increasing, especially in infants who have been hospitalized for a long time, or in infants whose older sisters and brothers are sick, and are easily infected. 3, clinical manifestations: irritating cough as the main characteristic, cough deep, not on the sputum, heavier at night, some like whooping cough-like cough, individual may have wheezing, fever or no fever, with cephalosporins or penicillin type ineffective when you should think of this disease. In recent years, there are more severe Mycoplasma pneumoniae infections with high fever lasting for more than 1 week or 2 weeks, large solid shadow on chest X-ray, and even pleural effusion. Some show severe myocardial damage, and some combined with encephalitis, showing headache, vomiting, poor mental health, and even a coma. 4, treatment: Most parents are nervous when they hear mycoplasma infection, in fact, most of this disease is a mild disease, for children without fever, chest X-ray without pneumonia, oral medication can be, macrolides are effective, such as roxithromycin capsules, clarithromycin dispersible tablets, azithromycin are effective, you can alternate medication. The course of treatment is 2 to 3 weeks. For children with febrile pneumonia, or combined bacterial infections, it is best to treat with intravenous fluids, and those with comorbidities should be hospitalized and can be maintained orally after their condition improves. The total course of treatment is 2-3 weeks or even 3-4 weeks, depending on the condition.