Yellow sputum in the throat in the morning, clinically, according to the source of the patient’s yellow sputum, can be divided into the following cases, the first is the yellow sputum formed by the patient’s retracted snot, this mainly comes from sinusitis and the inflammatory infection of the nasopharynx is related, generally clinical treatment suggests that the patient do sinus CT examination, and at the same time do electronic nasopharyngoscopy to check the disease situation of the nasopharynx and sinuses. The second disease is caused by pharyngitis. Some patients have chronic pharyngitis irritation, lymphatic follicle hyperplasia in the posterior pharyngeal wall and tongue root, with significant lymphatic follicle hyperplasia and localized suppuration. In patients who wake up in the morning, there is a manifestation of yellow sputum in the throat. Some patients have yellow sputum after coughing in the morning, and this yellow sputum usually originates from the trachea, which may indicate infection of the trachea and lungs. All in all, the main sources of yellow sputum in the throat of patients may be the nose, nasopharynx, pharynx, trachea, lungs and other parts of the body.