Some of the general surgery is called general surgery, but it is never a general surgery. In fact, general surgery is a clinical discipline that treats diseases such as liver, biliary tract, pancreas, gastrointestinal, anorectal, vascular diseases, tumors of thyroid and breast and traumatic infections mainly by surgery, and it is the largest specialty of the surgical system. In addition to general surgery, general hospitals also have orthopedics, neurosurgery, cardiothoracic surgery, urology, and so on. Some hospitals even divide the general surgery into more detailed neck breast, gastrointestinal surgery, hepatobiliary, pancreatic and spleen surgery, and anorectal, vascular surgery, pediatric surgery, etc. The diseases included in general surgery are: 1, neck diseases, such as neck injury, thyroid disease, etc. 2. Breast diseases, such as mastitis, breast cancer, etc. 3.Peripheral vascular diseases, such as varicose veins of lower limbs, etc. 4, abdominal wall diseases, such as inguinal hernia, etc. 5, abdominal emergencies, such as trauma, peritonitis, gastrointestinal bleeding, etc. 6, gastrointestinal diseases, such as gastric perforation, appendicitis, intestinal obstruction, gastric cancer, colon cancer, etc. 7, rectal and anal canal diseases, such as hemorrhoids, anal fistula, rectal cancer, etc. 8.Hepatobiliary, pancreatic and spleen diseases, such as liver cancer, cholecystitis, biliary stones, pancreatitis, portal hypertension, splenomegaly, etc. 9, other, such as retroperitoneal tumor, tetanus, snake bite, etc. In addition, general surgery is very closely related to the basic knowledge of surgery, such as surgical infection, tumor, shock, blood transfusion, fluid balance, enteral and parenteral nutrition, vital organ failure, ICU, transplantation, microscopy, minimally invasive, etc. Any doctor of other specialties, such as brain surgery, heart surgery, must go through more than 3 years of study in general surgery to master the general theory of surgery and surgical operation techniques before starting the specialty.