The posterior pharyngeal wall, also known as the posterior pharyngeal wall, is located in the continuation of the oral cavity to the rear, and the vertical surface of the pharyngeal mucosa facing the eyes when the mouth is open is the posterior pharyngeal wall. The posterior pharyngeal wall is located between the soft palate and the plane of the upper edge of the epiglottis, located in the continuation of the oral cavity to the rear, usually called the pharynx is also referred to this area. There are scattered lymphoid follicles under the mucosa of the posterior wall; this is a common site of lymphoid follicular hyperplasia. When the tongue is pressed down, they are more clearly visible, and nausea and nausea can be felt when touched. The pharynx is susceptible to external irritants such as irritating gases, dust, and tobacco, which can lead to inflammation of the pharynx or posterior pharyngeal wall. Inflammation can be manifested as pus spots on the posterior pharyngeal wall or pain in the pharynx. The posterior wall of the pharynx is also an area prone to inflammation, and good habits should be maintained in daily life, and timely medical attention is recommended if there is any discomfort in the pharynx.