Laryngeal cysts may be caused by congenital developmental abnormalities, inflammatory stimulation, obstruction of glandular ducts, etc. It is recommended to take active treatment. 1. Congenital developmental abnormality: some people are born with structural abnormality of laryngeal vesicles, and in the process of development, chronic cough and other symptoms will occur, resulting in expansion of laryngeal vesicles, which can cause pharyngeal cysts. 2. Inflammatory stimulation: part of the chronic inflammation due to long-term stimulation of the laryngeal mucosa, resulting in mucosal edema, easily caused by pharyngeal cysts and other conditions. 3. Glandular duct obstruction: As there are many glands in the pharynx, there are many glandular ducts distributed in the glands, and the liquid secreted by the glands can be discharged outward through the glandular ducts. If the glands or ducts are blocked, it can lead to fluid retention and cause pharyngeal cysts. Most pharyngeal cysts are benign. When the cysts are small and asymptomatic, they usually do not require special treatment and can be observed on follow-up. If the cyst is large and causes a foreign body sensation in the pharynx or affects eating or speaking, active treatment is needed.