Foreign body sensation in the throat and white mucous sputum, common causes are chronic laryngitis, chronic sinusitis, reflux pharyngitis, etc.. 1. Chronic pharyngolaryngitis: a chronic infection caused by diffuse pharyngeal lesions, mainly manifested as chronic mucosal inflammation of the pharynx, there will be pharyngeal discomfort, dryness, itchiness, distension and other symptoms, and secretions and a foreign body sensation. 2. Chronic sinusitis: chronic sinusitis patients may be combined with symptoms of nasal reflux, nasal secretion stimulation may cause foreign body sensation in the throat, and the feeling of mucous phlegm increase. 3. Reflux pharyngitis: it refers to the reflux of gastric acid through the esophagus to the pharynx, resulting in localized mucosal congestion and edema in the pharynx, gastric acid stimulation leads to retention of saliva secreted in the mouth, which can be concentrated for a long period of time to form a white mucous phlegm, accompanied by foreign body sensation. There may be other reasons for the foreign body sensation in the throat and white mucous phlegm, so it is recommended to go to the hospital in time to find out the cause of the disease and treat the symptoms.