The normal healthy throat wall is the oropharynx. The oropharynx is covered with a light red mucous membrane, above which can be found the soft palate, the uvula, which is located in the middle of the oropharynx and does not adhere to the back of the tongue, flanked by the palatopharyngeal arch, the tonsils, and the palatoglossal arch. Usually the tonsils do not exceed the palatopharyngeal arch, but are located on either side of the tonsils. Between the two palatopharyngeal arches is the posterior pharyngeal wall, which usually has scattered lymphoid follicular hyperplasia. Understanding the normal pharyngeal morphology is important in determining abnormalities in pharyngeal diseases. For example, in acute tonsillitis, the tonsils may be enlarged beyond the palatopharyngeal arch. In inflammation, it can cause the uvula to become longer and thicker and adhere to the back of the tongue, causing a foreign body sensation in the pharynx, etc.