There are mainly the following clinical reasons: the first reason is that some patients have pulmonary tracheal diseases. Commonly, there are chronic bronchitis, bronchial asthma, tuberculosis, lung abscess and other related diseases that cause patients to have tracheospasm, wet rales, dry rales and other related manifestations of sputum in the lungs, which will manifest as the sound of sputum in the throat. The second condition is the patient’s pharyngeal disease, for example, some patients have acute epiglottitis, localized swelling and edema of the epiglottis, and more secretions blocking the airway, which will appear as a sound when the patient breathes. Some patients for example have laryngeal stenosis. Commonly, laryngeal cancer leads to narrowing of the vocal cords or incomplete paralysis of the vocal cords, and other causes may also cause a voice in the throat. Most of these sounds are caused by the narrowing of the airflow induced by poor airflow. All in all, if patients have voice in the throat, it is recommended to improve the electronic laryngoscopy, improve the lung CT, and recommend comprehensive examination and treatment in respiratory medicine and ENT department.