Always feel phlegm in the throat may be upper respiratory tract infections, pharyngeal allodynia, psychosomatic disorders and so on. 1. Upper respiratory tract infections: such as colds, rhinitis, sinusitis, pharyngitis, etc., may cause the patient’s throat to appear phlegm, usually accompanied by sore throat, dry throat, pharyngeal foreign body sensation and other manifestations. 2. Pharyngeal heterosensory disorder: generally refers to the patient has an abnormal sensation in the pharynx after excluding organic diseases. It may be related to chronic inflammation of tonsil, chronic inflammation of pharynx, excessive length of stem, sensory dysfunction of brain, etc. Its etiology is complicated. 3. Mental and psychological diseases: when the emotion is too tense, anxiety, fear, etc., it may also cause the phenomenon of always feeling phlegm in the throat. In addition to the above factors, there may be other causes of the symptoms, it is recommended to consult a doctor for timely examination, and follow the doctor’s instructions for active treatment.