According to Chinese medicine, loss of voice is a condition in which the main clinical manifestation is hoarseness, or even complete inability to produce sound. It is also known as “mute”. There is a difference between new and long term. New diseases are mostly caused by external wind, cold, dryness and heat, or phlegm and heat; long term diseases are mostly caused by lung and kidney yin deficiency. It is equivalent to acute and chronic laryngitis, vocal cord lesions, hysterical loss of voice, laryngeal tuberculosis and other diseases in Western medicine. As early as the “Ling Shu” pointed out: “the throat, the reason why the gas up and down, will be loosened, the sound of the household, the lips, the sound of the fan also, the tongue, the sound of the machine also, the suspension of the Yong Drops, the sound of the off also.” In the Song Dynasty, “Ren Zai Zhi Zhi” pointed out that “the lung is the door of sound, the kidney is the root of sound.” The Qing dynasty Ye Tianshi “clinical evidence guide medical case” said “gold real is no sound, gold broken also no sound”, the image illustrates the loss of sound has the difference between real and virtual. Long-term disease loss of voice, lung and kidney qi and yin two injuries, the treatment should moisten the lungs and nourish the kidneys, with clear sound soup, Baihe solid gold soup and other formulas. And loud shouting, strong cursing and insults, loss of lung qi and depletion of lung qi can also cause this evidence. Long-term mute is mostly caused by internal injury, slow onset of disease, mostly caused by deficiency of the body due to long-term illness, lung dryness and fluid injury, or deficiency of lung and kidney yin, internal seizure of essence, and dryness and astringency of the vocal tract.