Always have phlegm in the throat, may be related to chronic simple pharyngitis, chronic bronchitis, chronic sinusitis and other diseases. 1. Chronic simple pharyngitis: It is usually due to pharyngitis that the mucous membrane around the throat is damaged, making it congested, swollen and with increased secretion, which leads to the phenomenon of having phlegm in the throat all the time, and pharyngitis may have symptoms such as congestion, burning, swelling and pain. 2. Chronic bronchitis: usually due to the bronchial tubes in the inflammatory stimulation, resulting in damage to the mucous membrane in the bronchial tubes, congestion, swelling, and then there is always phlegm in the throat phenomenon, may be accompanied by coughing phlegm, asthma and other symptoms. 3. Chronic sinusitis: may be due to the nasal cavity in the sinus inflammatory media stimulation, resulting in increased nasal secretions, and nasal discharge backflow, stimulation of the mucous membrane of the pharynx, and then there is always a phlegm in the throat phenomenon, sinusitis usually appear nasal congestion and other symptoms. When there is always phlegm in the throat, you should consult a doctor in time and standardize the treatment after a clear diagnosis.