EST surgery is relatively mature and relatively safe, and its surgical complications are as follows: 1. Similar to conventional gastroscopy, the main complications include damage to the digestive tract, bleeding, perforation, etc. The chances of such complications are relatively small, but patients should be informed before surgery so that they are informed. 2. The more fatal complications associated with EST surgery include bleeding, and smaller bleeding can be dealt with during surgery, but if it is delayed bleeding, it can be fatal if it occurs a few days later. The problem of postoperative pancreatitis is not a problem because of simple amylase elevation after surgery, but some patients may develop severe pancreatitis, which may cause fatal damage to the patient. With the development of technology, the operator is more and more experienced and skilled, the chances of such complications are rare, and after they occur, relevant measures will be taken to try to make up for them and reduce the damage to the organism from complications.