Pancreatic cysts may be caused by congenital developmental abnormalities, secondary to pancreatitis, parasitic infections and other reasons. 1. Congenital developmental abnormalities: some pancreatic cysts are cystic lesions of the pancreas caused by congenital, congenital true cysts are usually benign. 2. Secondary to pancreatitis: acute and chronic pancreatitis will lead to the accumulation of exudate in the body of the pancreas, which will be wrapped by the surrounding tissues to form cysts, usually pseudocysts, the wall of the cysts is not covered by epithelial cells, and some of them can be resorbed by themselves, and those who can’t be resorbed by themselves can be subjected to drainage or cystectomy. 3. Parasitic infection: Ascaris lumbricoides or worm infects the body of pancreas, which damages the normal tissues of the body of pancreas and causes inflammatory reaction locally, resulting in exudate from the body of pancreas, and the exudate is encircled by the surrounding tissues to form cysts. Pancreatic body cysts may also be cystadenoma, cystadenocarcinoma and other lesions, the discovery of pancreatic body cysts should go to the hospital in a timely manner to improve the examination, to clarify the cause of the disease and then give targeted treatment.