Foreign body sensation in the throat when swallowing may be caused by pharyngitis, tonsillitis and laryngeal tumor. 1. Pharyngitis: especially reflux pharyngitis, which is caused by the reflux of gastric acid that stimulates the throat, resulting in a foreign body sensation in the throat. 2. Tonsillitis: it is one of the common manifestations of upper respiratory tract infection, in which the tonsils of patients are enlarged and there is a foreign body sensation when swallowing. 3. Laryngeal tumor: such as laryngeal cancer, especially in the epiglottis, there is hissing in the early stage. In addition to the above reasons, foreign body sensation when swallowing may also be caused by esophageal diseases, etc. It is recommended that patients go to the hospital in time to improve the examination in order to clarify the specific causes of the disease.