The size of the tonsils usually does not exceed the palatoglossal and palatopharyngeal arches. Enlargement of the tonsils can be seen in inflammation of the tonsils, which may have a purulent discharge on the surface. In the oropharynx, the soft palate extends downward to form the anterior palatoglossal arch and the posterior palatopharyngeal arch, and the tonsils are located in the tonsillar crypts between the two. According to the relative relationship between the tonsils and the lingual and palatal arches, the pharyngeal and palatal arches, and the midline of the posterior pharyngeal wall, the enlarged tonsils can be categorized into three degrees: Ⅰ degree for not exceeding the palatoglossal and palatopharyngeal arches; Ⅱ degree for exceeding the pharyngeal and palatopharyngeal arches but not exceeding the midline of the posterior pharyngeal wall, and Ⅲ degree for exceeding the midline of the posterior pharyngeal wall or bilateral tonsil contact with each other. Enlarged tonsils, commonly seen in acute tonsillitis and other diseases, often caused by B hemolytic streptococcus infection, examination often have tonsils congestion, enlargement, the surface may have yellowish-white pus spots, there may be high fever, fatigue, pain in swallowing and other symptoms.