There are many reasons for dry mouth with phlegm, in general, it is mainly considered to be related to pharyngitis, bronchitis and other causes. At this time, patients should actively check the cause and treat it, and should not use drugs at will. 1, pharyngitis: due to the infection of viruses and bacteria in the tissues around the throat, its superficial tissue mucosa is stimulated and the mucus glands are functionally hyperactive causing an increase in local mucus, which pushes mucus to the mouth with the functional activity of the respiratory tract, resulting in symptoms of dry mouth, phlegm and increased saliva. If repeated, it can lead to tonsillar hypertrophy and further aggravate the symptoms; 2. Bronchitis: due to bacterial viruses and allergic substances stimulating the bronchial mucosa, which in turn produces a large amount of mucus, i.e., spit up sputum. In addition, some patients will have fever symptoms, when the body also needs more water and can feel dry mouth; 3. Other: diseases such as pharyngeal keratosis and reflux pharyngitis can also cause patients to have dry mouth with phlegm. At this time, patients need to be under the guidance of doctors, drug treatment. In normal life, it is recommended to eat a light diet, avoid eating too much stimulating, spicy food, can consume more fresh fruits and vegetables, drink more water. It is also necessary to pay attention to moderate exercise, avoid staying up late, and ensure regular work and rest.