Appendicitis examination primarily involves a physical examination. The patient lies flat with their legs bent, and the doctor stands on the patient's right side. The patient exposes their abdomen, and the doctor places their right palm flat in the middle of the abdomen, then smoothly performs a clockwise palpation, pressing the abdomen to check for rebound tenderness, especially at McBurney's point. If there is significant tenderness and rebound pain at McBurney's point, along with symptoms of fever and nausea, appendicitis is generally considered. An ultrasound can also be used as an auxiliary examination, where swelling of the appendix can be observed. Based on the physical examination and auxiliary tests, a preliminary diagnosis of appendicitis can be made.