Patients always have phlegm in the throat in their life, mainly consider the following reasons: 1, usually love to eat spicy and greasy food, the mucous membrane of the pharyngeal cavity may be chronically congested, often have inflammatory exudates, and eventually form mucous phlegm. 2, the influence of work factors, usually may often need to speak or sing, also easily lead to a lot of phlegm formation, the throat always form inflammation. 3, if there is tonsillar hypertrophy or adenoid hypertrophy, inflammatory exudates often appear and eventually phlegm is formed. 4. If you always have a cold, lymphatic follicles in the throat wall also proliferate leading to the formation of phlegm. Regardless of which of the above causes, active symptomatic treatment is needed for the patient’s condition to improve.