Tonsils, also called palatine tonsils, generally refers to a pair of lymphoid tissue masses located under the epithelium of the oropharynx that we can see with our naked eyes, and is named because of its resemblance to tonsils. Tonsils medial free surface toward the pharyngeal cavity, the surface of the squamous epithelium mucous membrane cover, its mucous membrane epithelium to the tonsil parenchyma into the formation of 6-20 varying depths of the blind tube known as the tonsillar crypt, mucosal epithelium to the parenchyma in the formation of the not sunken fossa, known as the tonsillar fossa, the invagination of the blind tubes and crypt, but also for the propagation of viruses, bacteria provide a favorable place. In the root of the tongue, the pharynx around the epithelium there are several groups of lymphatic tissue, according to different locations were called palatine tonsils, pharyngeal tonsils, tongue tonsils and pharyngeal tonsils, which together constitute the pharyngeal lymphatic ring, to prevent the occurrence of upper respiratory tract infections to provide a relatively tight line of defense. Although the palatine tonsils have a certain degree of defense, they can become inflamed with redness, swelling, pain, and pus when the immune system is low or when viruses or bacteria are large and virulent. In this case, it is important to seek medical attention and give symptomatic treatment to improve the uncomfortable symptoms.