Foreign body sensation in the throat may be caused by chronic hypertrophic pharyngitis, reflux pharyngitis, laryngeal cancer and other diseases. 1. Chronic hypertrophic pharyngitis: lymphoid follicle hyperplasia in the posterior wall of the pharynx, hypertrophy of tongue tonsils, thickening of mucous membrane in the posterior wall of the pharynx and fusion into a mass can cause this symptom, and patients can also have sore throat, dysphagia, itchy, dry, itchy pharynx, irritating cough and other discomforts. 2. Reflux pharyngitis: the return of gastric or duodenal contents into the throat can cause irritation to the throat, triggering the sensation of foreign body in the throat, and the patient may have acid reflux, heartburn, nausea, vomiting, abdominal distension, abdominal pain and other discomforts. 3. Laryngeal cancer: cancerous tissues appearing in the supraglottis area can lead to persistent foreign body sensation in the throat, and with the spread of the lesion, there can be hoarseness, sore throat, hemoptysis, dysphagia, dyspnea and other symptoms. If the symptoms of foreign body sensation appear in the throat, it is recommended to actively consult a doctor for systematic examination and clear diagnosis, and not to make blind judgment on one’s own, so as to avoid delaying one’s condition.