The taste of sludge in the throat may be caused by digestive diseases, chronic inflammation of the throat, and swelling in the throat. 1. Digestive diseases: common in indigestion, chronic gastritis and other diseases, can affect the patient’s digestive function, resulting in more food in the gastrointestinal tract in the accumulation, easy to produce a fermentation reaction, may cause the throat with a sludge flavor. 2. Chronic inflammation of the throat: common in chronic tonsillar keratosis, chronic pharyngitis, chronic tonsillitis, etc., in the stimulation of inflammation, resulting in tonsils, pharynx, congestion, edema, and even produce erosion, may cause the throat has a peculiar taste, which may cause the throat has a sludge taste. 3. Laryngeal swelling: such as pharyngeal polyps, pharyngeal papilloma and other diseases, due to tumor stimulation, is likely to lead to laryngeal mucous membrane erosion, which may result in the throat has a bad taste, may also be accompanied by dyspnea, swallowing disorders and other symptoms. If there is any other reason for the sludge taste in the throat, you should consult a doctor as soon as possible if there are other uncomfortable symptoms.