Swallowing foreign body sensation for three or four years has not been recovered, mainly considered by the pharyngeal diseases, common causes include chronic pharyngitis, enlarged tonsils, epiglottis cysts, as well as pharyngeal tumors and mental psychological factors. 1. Chronic pharyngitis: chronic pharyngitis will appear lymphoid follicle hyperplasia, which will lead to local mucous membrane stimulation, causing foreign body sensation in the throat. 2. Enlarged tonsils: closely related to chronic inflammation, enlarged tonsils cause pressure on the surrounding tissues, which can also cause corresponding symptoms. 3. Epiglottis cyst: it is a cystic lesion in the epiglottis, which causes pressure and irritation to the tissues around the epiglottis, and will cause corresponding symptoms. 4. Pharyngeal tumor: Pharyngeal tumor (laryngeal cancer, etc.) can cause foreign body sensation in swallowing by damaging and invading the surrounding tissues. Foreign body sensation in swallowing does not get better all the time, and it is also common in reflux pharyngitis, chronic rhinitis and sinusitis, and mental and psychological factors, etc. It is necessary to consult a doctor for systematic examination in time to make a clear diagnosis, and carry out standardized treatment under the guidance of a specialist doctor.