External drainage of pancreatitis pseudocysts refers to the puncture of pancreatic pseudocysts and placement of drainage catheters to drain the cystic fluid outside the body. Pancreatic pseudocysts are a common complication of severe pancreatitis, most of which are solitary, and the cysts usually increase in size. When pancreatic pseudocysts have bleeding, infection, rupture, large diameter, and conservative treatment is ineffective, surgical treatment is needed. The three most commonly used surgical methods are external drainage, internal drainage and pseudocyst excision. External drainage of pancreatitis pseudocyst is to choose the best site to puncture the pancreatic pseudocyst under the guidance of ultrasound and drain the cystic fluid out of the body, so as to achieve the purpose of drainage. Once pancreatitis pseudocyst occurs, you should go to the hospital in time, and the doctor will choose the appropriate treatment according to your condition.