There is no contagiousness in tonsillitis, clinically there are mainly the following analysis. The first is that chronic tonsillitis is not contagious, mainly due to the development of acute tonsillitis repeatedly delayed and not healed. The second, acute tonsils, mainly divided into acute simple tonsillitis and acute purulent tonsillitis. Acute simple tonsillitis is less contagious, but for acute purulent tonsillitis has a certain degree of contagiousness. It is mainly caused by Streptococcus b haemolyticus infection, but also includes Staphylococcus aureus, Streptococcus pneumoniae, anaerobic bacteria, and viruses, all of which may be mixed. Clinically, patients with acute suppurative tonsillitis can be infected through droplets, food contact, or other direct contact, especially for the elderly and children who are immunocompromised, and are quite contagious. Therefore, patients with acute septic tonsillitis can be properly isolated to avoid transmission to other patients through droplets, coughing or talking.