Patients with appendicitis may have pain in the right lower abdomen, mainly at the intersection of the umbilicus and the external and external 1/3 of the anterior superior iliac spine, which is the body projection of the appendix, and in severe cases there may be rebound pain and muscle tension. 2. Patients with cholecystitis may have pain in the right upper abdomen, especially at the intersection of the outer edge of the rectus abdominis muscle and the costal arch. 3. Patients with pancreatitis have periumbilical pressure pain, and in severe cases, there is also significant petechiae around the umbilicus or abdominal wall. 5. Tumors of the intestinal tract, specifically including ascending colon cancer or descending colon cancer, also show pressure pain in the corresponding areas. 6. There is periumbilical pressure pain, but there is no rebound pain and muscle tension.