Chronic pharyngitis is a chronic inflammation of the pharyngeal mucosa. The main clinical manifestations are discomfort in the pharynx, dryness, foreign body sensation or mild pain, dry cough, nausea, dark red pharynx congestion, and lymphatic follicles visible in the posterior pharyngeal wall. Patients with chronic pharyngitis often have clearing and noise action and vomit white mucus because of increased pharyngeal secretions. What are the most important tests for mucus in the throat caused by chronic pharyngitis? 1, oropharyngeal examination method: is the most simple and practical method, the patient sitting, natural open mouth breathing. The doctor sits opposite, holding the tongue depressor first check the oral cavity, then gently press the tongue depressor down the front 1/3 of the tongue, so that the back of the tongue is low, exposing the oropharynx, observe the soft palate, uvula, palatoglossal arch, palatopharyngeal arch, tonsils, pharyngeal lateral wall and posterior pharyngeal wall morphological changes and mucosal color, degree of wetness, the presence of lymphatic follicular hyperplasia and other conditions. Finally, the patient was asked to make ah-ah sounds and observe the soft palate activity. In patients with chronic pharyngitis, the oropharyngeal mucosa is thickened and dark red, and the lymphatic tissue is proliferated in a granular fashion. Patients with atrophic pharyngitis have dry, atrophic, shiny pharyngeal mucosa with mucous scabs attached. This is one of the examination methods for chronic pharyngitis. 2, indirect nasopharyngoscopy method: the patient is sitting, head slightly tilted back, natural open mouth with the nose calm breathing. The doctor holds the tongue depressor to depress the back of the tongue, and the right hand holds the nasopharyngeal mirror (first it should be slightly heated and warmed so that the mirror surface is not foggy) and gently reaches between the uvula and the posterior pharyngeal wall to adjust the angle of the mirror and observe the nasopharynx. 3.Indirect laryngoscopy method: the patient sits upright, tilts the head back slightly, opens the mouth and extends the tongue. The doctor wraps the front 1/3 of the tongue with gauze, pinches the tongue with the thumb and middle finger of the left hand, gently pulls the tongue out to the front and bottom, pushes the upper lip with the index finger, and holds the indirect laryngoscope with the left hand in the pen position, with the mirror facing forward and downward, and the back of the mirror pressing against the front of the uvula, pushing the soft palate upward. The angle of the mirror is adjusted to observe the laryngopharynx and laryngeal cavity. This is also the examination method for chronic pharyngitis.