Mycoplasma pneumonia is contagious during infection and treatment. The contagiousness usually disappears after complete healing, which can be treated with medications such as erythromycin. Mycoplasma pneumonia is mainly spread through the respiratory tract, and the common mode of transmission is that the infected person sneezes and coughs to expel the pathogen, which may be inhaled by healthy people and lead to infection. The infected person is contagious during the whole process of infection and treatment, and the contagiousness usually disappears after cure. Infection with Mycoplasma pneumonia may result in fever, cough, malaise, muscle aches, diarrhea, and other symptoms. The treatment of Mycoplasma pneumonia is mainly based on drugs, which can be targeted by macrolide antibiotics such as erythromycin and azithromycin, and can be changed to quinolone antibiotics such as ofloxacin if the treatment effect is not good. However, it should be noted that quinolone antibiotics are not recommended for children under 18 years of age. Erythromycin and other drugs mentioned above should be used under the guidance of a clinician and should not be used without authorization; if Mycoplasma pneumonia is suspected, it is recommended to go to the hospital in a timely manner.