Recurrent attacks of Mycoplasma pneumoniae are considered to be caused by autoimmune deficiency, improper treatment, cross-infection and other reasons. 1. Low autoimmunity: low autoimmunity itself is one of the important triggers for the formation and development of Mycoplasma pneumoniae. Therefore, even if patients with Mycoplasma pneumoniae regain their health after treatment, they will still be susceptible to the invasion of pathogens due to low immunity, resulting in recurrent attacks of the disease. 2. Improper treatment: The recurrence of Mycoplasma pneumoniae may also be caused by improper treatment. For example, in the absence of sufficient quantity and course of medication, the pathogens inside the organism are not effectively eliminated, which will lead to the recurrence of the disease. 3. Cross-infection: Because Mycoplasma pneumoniae is a contagious disease, the recurrence of Mycoplasma pneumoniae does not exclude the possibility of cross-infection with friends and relatives. Once an individual has a recurring attack of Mycoplasma pneumoniae, he or she should consult a hospital in time, strictly follow the doctor’s instructions for treatment, and at the same time do a good job of daily care and health care to prevent the recurrence of the disease.