The disease is categorized into "Baoyin" (sudden aphonia) in TCM. When depressed liver qi invades lung meridian, thoracic qi cannot run through the throat for phonation;or when the cardiac vitality loses its nourishment, the throat will lose its dominator, failing to pronounce. This explains the pathogenic factors and pathogenesis of the disease.According to the theory of traditional Chinese medicine, there are some patterns of syndrome that lead to hysterical aphonia.1. Syndrome of qi stagnation due to depression of the liver2. Syndrome of loss of nourishment of cardiac vitality