Pharyngeal cyst is a general term for vocal cord cyst, epiglottis cyst and other diseases, while pharyngeal cyst may be caused by congenital developmental abnormalities, mucus duct obstruction, chronic cough and other factors. 1. Congenital developmental abnormality: When the area of laryngeal sacs is larger than normal, the laryngeal sacs will be easily stimulated by pressure, which will lead to cysts in the pharynx. 2. Mucous duct obstruction: mostly formed by inflammation stimulation caused by submucosal mucous gland duct obstruction, or a few due to developmental mucous gland duct obstruction after the expansion of the gland cavity, mucus retention. It will lead to the formation of cysts in the pharynx, and those occurring in the vocal cords can have voice changes, hoarseness and other manifestations. 3. Chronic cough: long-term persistent cough symptoms, will produce stimulation of the body and lead to increased pressure in the laryngeal sac and expansion, thus forming a pharyngeal cyst. In order to timely treatment of pharyngeal cysts, it is recommended to go to the ENT department of regular hospitals for professional standardized diagnosis and treatment.