White mucous phlegm in the throat, transparent, is considered to have the following possibilities. The first disease, long-term sinusitis, rhinitis, etc. leads to the backflow of nasal snot into the throat, the patient appears to have mucous phlegm in the throat, the patient may have clinical manifestations such as nasal congestion, nasal non-ventilation, etc. Doing sinus CT can clarify the inflammatory changes in the sinuses, and treat sinusitis on the line. The second disease, patients have long-term chronic bronchitis, chronic pneumonia and other diseases, resulting in repeated coughing and coughing, so that there may be white mucus-like secretions attached inside the throat. The third disease, some patients have long-term hiccups, acid reflux and other reflux esophagitis resulting in reflux pharyngitis, stomach acid and other damage to the mucous membrane of the throat, resulting in inflammatory changes in the throat, often appearing phlegm in the throat. Patients with the above symptoms are advised to go to the ENT department for examination of the nasal cavity, oropharynx, pharynx, trachea, esophagus, etc.