The hazards of tonsillectomy may include lowered immunity, foreign body sensation in swallowing, and susceptibility to respiratory tract infections. 1. Reduced immunity: because the tonsils have a certain immune defense function, if the patient is young, the body immune system is not mature enough, for some reason need to remove the tonsils, to a certain extent, may lead to the patient’s immune system. 2. Foreign body sensation when swallowing: after tonsillectomy, the soft tissues at the site of removal will have contracture and scarring, which will make the patient feel foreign body sensation when swallowing. 3. Easy to suffer from respiratory infections: after tonsillectomy, the respiratory tract is missing a part of the defense door, and when the patient suffers from a cold, resulting in decreased immunity, respiratory infections may occur. After tonsillectomy, if there are uncomfortable symptoms, it is recommended to go to the hospital in time for diagnosis and treatment.