Clinically, if the type of disease causing the loss of voice cannot be determined, the loss of voice to be examined can be used as the initial diagnosis, and the diagnosis and treatment will be carried out. Loss of voice should be carried out from the following aspects of the examination: 1, loss of voice to the clear, hoarse voice, or even can not pronounce as the main performance. Unlike syncopal diseases, stroke, fainting, etc., and do not know how to speak; with the weakness of qi deficiency and low voice, etc., different. 2, loss of voice is generally pharyngeal diseases, according to the condition and laryngeal examination for diagnosis. Such as: (1) to the loss of voice as a prominent manifestation of the disease called laryngeal raspy. Suddenly and accompanied by sore throat, for the violent raspy; long-term hoarseness, for a long time raspy. Women who lose their voices in the late stages of pregnancy, known as child raspy; postpartum hoarseness, postpartum raspy. (2) many diseases of the larynx, such as rotting laryngeal cholera, breast moth, laryngeal paralysis, laryngeal carbuncle, laryngeal polyps, laryngeal tumors, pharyngeal fungus, vocal opening and closing can not be, etc., may cause hoarseness, but there must be other symptoms, laryngeal examination of the corresponding special changes. (3) If the disease is prolonged and the voice is lost, and there are night sweats, hot flashes, etc., most of them are laryngeal lichen planus. (4) Fever, sore throat, white membrane between the larynx which is not easy to be peeled off, hoarseness of voice, mostly diphtheria. (5) Liver qi stagnation and qi dysfunction can be manifested as qi syncope and loss of voice. 3.According to the clinical needs, the necessary examination, pharyngeal X-ray film, fiber laryngoscopy, cytological examination, etc., to help clarify the diagnosis.