White mucus in the throat is mainly seen clinically in the following diseases: 1. It is mostly seen in chronic pharyngitis. Patients with chronic pharyngitis will have white secretions due to dark red congestion in the throat and hyperplasia of lymphatic follicles in the posterior pharyngeal wall and tongue root. This condition can be diagnosed basically by doing electronic laryngoscopy.2. White mucus in the throat caused by lung diseases can be accompanied by coughing and repeated coughing of white mucus sputum. The more common clinical diseases are chronic bronchitis and chronic pneumonia, mostly seen in patients who smoke for a long time, stay up late for a long time, and have a relatively low and weak body resistance. 3, it is a wind-cold cough and cold that causes water loss in the oropharyngeal cavity, swelling and pain in the throat, and tends to form very sticky phlegm stuck in the throat. If there is not enough water, it is common to have white mucus in the throat.