Mute voice may be due to excessive use of voice, long-term loud shouting caused by acute laryngitis, may also be due to vocal polyps, chronic laryngitis and other diseases. 1. Acute laryngitis: usually patients usually excessive use of voice or long-term loud shouting, will lead to the mucous membrane of the vocal folds edema, resulting in the symptoms of mute voice. 2. Vocal polyps: usually due to long-term smoking and drinking, engaged in high-temperature work, exposure to a large number of irritating substances and other conditions, and also with pharyngeal reflux, endocrine disorders, upper respiratory tract infections and other factors. Patients often experience persistent hoarseness and fatigue. If the polyp is large, dyspnea and stridor can also occur. 3. Chronic laryngitis: usually due to long-term bad habits, some systemic diseases and other conditions, but also with the mental psychological, occupational and other factors. Patients often appear hoarse, throat secretion increased symptoms, and can also be accompanied by burning throat, dryness, foreign body sensation, tingling and other discomfort. It is recommended that patients with symptoms of hoarseness actively seek medical treatment and systematic examination for a clear diagnosis.