The tonsils include the palatine tonsils, pharyngeal tonsils, lingual tonsils, and pharyngeal tonsils. The palatine tonsils are located in the pharynx at the fossa of the tonsils, the pharyngeal tonsils are located in the nasopharynx, the lingual tonsils are located at the base of the tongue, and the pharyngeal tonsils are located at the posterior edge of the pharyngeal opening of the Eustachian tube. The palatine tonsils, which are often referred to as tonsils, are located behind the root of the tongue in the oropharynx, one on each side, in the tonsil fossa. When inflammation of the tonsils occurs, they can become visibly congested and enlarged, with symptoms of sore throat. The pharyngeal tonsils, also known as adenoids, are located where the parietal and posterior walls of the nasopharynx migrate. When adenoid hypertrophy occurs, snoring can occur and in severe cases surgical removal is required. The lingual tonsils are granular in shape and located at the root of the tongue. When acute or chronic lingual tonsillitis or lingual tonsillar hyperplasia occurs, it can show obvious congestion, swelling and foreign body sensation. Eustachian tube tonsils: located at the posterior edge of the pharyngeal opening of the eustachian tube. Symptoms vary from one tonsil to another. Once the uncomfortable symptoms, it is recommended to go to the ENT department of the hospital in time, and standardize the treatment under the guidance of the doctor.