There are six main manifestations of appendicitis: first, abdominal pain. Typical abdominal pain in appendicitis starts in the upper middle abdomen or around the umbilicus, and after 6-8 hours, the abdominal pain is shifted and fixed in the right lower abdomen. When the inflammation reaches the plasma layer and the wall peritoneum, the pain is fixed in the right lower abdomen. Second, gastrointestinal symptoms. Patients may experience nausea and vomiting. The third one, fever. There is usually only a low fever and no chills. Suppurative appendicitis usually does not exceed 38°C. If the appendix becomes gangrenous and perforated, the patient will have a temperature of more than 38°C or even 40°C. The fourth, pressure pain and rebound pain. The pressure point of the appendix is located at the McKinsey point. The fifth, abdominal muscle tension. If the appendix is septic, perforated and complicated by peritonitis, tension of the whole abdominal muscle can appear. Sixth, skin sensory sensitization occurs.