After appendicitis surgery or stomach pain due to incision pain, intestinal spasm and intra-abdominal inflammation. 1. Incision pain: appendicitis surgery is currently minimally invasive surgery, but there are still wounds, postoperative activities may pull the incision and abdominal pain, if the incision has no signs of infection, it is a normal phenomenon. 2. Intestinal spasm: During and after surgery, the vagus nerve will be stimulated, which will lead to stomach discomfort and weakening of intestinal function, and pain will occur when the digestive function is gradually restored. 3. Intra-abdominal inflammation: post-operative inflammation may still exist in the abdominal cavity, and abdominal pain will occur when the inflammation does not subside completely. It is recommended to communicate with the attending surgeon in time for targeted treatment.