There is always mucus phlegm in the throat, clinically there are mainly the following cases. 1, the most common is caused by chronic pharyngitis, patients show sticky secretions attached to the back wall of the pharynx and the root of the tongue, which are not easy to cough up and recur, this condition is mainly a manifestation of lymphoid follicle hyperplasia and exudate in the back wall of the pharynx and the root of the tongue. The symptoms may be relieved with the application of oral medications for pharyngitis, such as Blue Scutellaria Oral Liquid, Golden Voice Open Tone Capsules, and Golden Voice Ligustrum Pills.2. Some patients have respiratory diseases such as chronic bronchitis and pneumonia, which repeatedly cause secretions to be coughed into the throat and form sticky phlegm.3. Some patients have reflux gastritis, in which digestive enzymes such as stomach acid reflux into the throat and form sticky phlegm.