Is Mycoplasma pneumoniae IgM strong, serious? It should be decided based on individual constitution and the duration of illness. It is a common clinical pathogen and generally not considered a severe disease. With timely and appropriate treatment, it generally takes about one to two weeks to fully recover to normal. Therefore, after being diagnosed, it is important to have a correct understanding, avoid excessive mental and psychological stress, follow the treatment course and doctor's advice, choose appropriate and sensitive antibacterial drugs to eliminate the pathogen, and re-examine one week after stopping the medication to determine if the disease has fully recovered.