Tonsillitis can be caused by anaerobic infections, as well as pathogenic infections such as aerobic bacteria, viruses, and mycoplasma. Tonsillitis is a non-specific inflammation of the palatine tonsils caused by a variety of pathogenic bacteria, often accompanied by inflammation of the pharyngeal mucosa and pharyngeal lymphoid tissue of varying degrees. The causative agents of tonsillitis include bacteria, viruses, and mycoplasma. Bacteria are predominantly hemolytic streptococci, followed by staphylococci, pneumococci, and in recent years, anaerobic infections have been found. Viruses such as adenovirus and influenza virus can also cause the disease, while mixed bacterial and viral infections are also common. The presence of the above pathogens in the oral cavity and tonsils of normal people under normal circumstances will not cause the disease, when the body’s immunity is reduced, the pathogens multiply can cause the disease. Secondly, pharyngitis, rhinitis, stomatitis and other spread can also involve the tonsils. When tonsillitis occurs, it is recommended to go to the hospital in a timely manner, complete the relevant examination, under the guidance of the doctor to clarify the cause of the disease after diagnosis and treatment.