Cyst mechanization is the process by which new granulation tissue is generated and replaces the necrotic material inside the cyst. After the formation of a cyst, due to the generation of necrotic material, and the necrotic material can be wrapped by the wall of the cyst, and is not easy to be completely dissolved and absorbed, or separated and discharged, at this time the newborn granulation tissue can be absorbed and replace the necrotic material, the process of cyst mechanization. The formation of granulation tissue can phagocytosis and ingestion of necrotic foreign body, necrotic foreign body in the enzyme action and be dissolved and absorbed, with the scarring of the granulation tissue, the cyst can be replaced. It is important to note that surgical removal of a cyst with mechanization is determined by the nature of the cyst.