Hidden pain in the middle and upper abdomen after pancreatic surgery may be caused by pancreatic pseudocyst, peripancreatic infection, pancreatic leakage and so on. 1. Pancreatic pseudocysts: the symptoms of pancreatic pseudocysts are related to the location and size of the cysts. If it is near the peritoneum, it can cause irritation to the peritoneum, and abdominal pain, fever, nausea and vomiting and other symptoms will appear. 2. Peripancreatic infection: the surrounding tissues may become infected secondary to pancreatic surgery, causing local irritation and abdominal pain and other symptoms. 3. Pancreatic leakage: mild pancreatic leakage may be asymptomatic, while severe pancreatic leakage may have upper abdominal pain, accompanied by tachycardia, shortness of breath and other symptoms, and peritonitis may occur in case of infection. There are many reasons for the hidden pain in the upper and middle abdomen after pancreatic surgery, you should go to the hospital in time, improve the relevant examination to clarify the cause of the disease, and standardize the treatment under the guidance of the doctor.