Foreign body sensation in the pharynx may be caused by chronic pharyngitis, reflux pharyngitis, pharyngeal allodynia and other diseases, and usually there will be dry and itchy throat, repeated throat clearing action, pharyngeal foreign body sensation and other symptoms. 1. Chronic pharyngitis: common symptoms mainly manifested as dry throat, itchy throat, foreign body sensation, burning sensation in the pharynx, etc. Part of the population will have nausea and dry vomiting when brushing teeth in the morning. Chronic pharyngitis spreads to the neighboring organs, such as spreading the larynx will appear hoarse symptoms, spreading to the ear, the ear will have a stuffy, blocked feeling. 2. Reflux pharyngitis: it is a disease caused by the reflux of gastric acid into the throat, and the main symptoms include repeated throat-clearing movements, itchy throat, chronic cough, and pharyngeal foreign body sensation. 3. Pharyngeal foreign body sensation: it refers to various abnormal sensations in the pharynx other than pain, such as the feeling of ball plugging, ant line sensation, stuffy sensation, etc., and mucous secretion attached to the wall of the pharynx produces a feeling of coughing and swallowing, which can be caused by mental and psychological factors and systemic diseases. The specific symptoms of foreign body sensation in the pharynx need to be based on clinical manifestations combined with relevant examinations to determine what kind of disease is clearly diagnosed after targeted treatment.