Physical examination of appendicitis mainly includes: i. Right lower abdominal pressure pain, which is the most common and important sign of acute appendicitis. The point of pressure pain is usually at the McDonald’s point, which varies with the location of the appendix, and is characterized by the pressure pain point always being fixed in one position, and the fixed pressure pain can appear in the right lower abdomen when the early onset of the disease has not yet metastasized to the right lower abdomen. Second, peritoneal irritation signs, including rebound pain and muscle tension, which is a defensive response to the stimulation of the abdominal wall, suggesting possible suppuration, gangrene and perforation of the appendix. Third, the right lower abdominal mass, a painful mass with unclear and fixed borders is found in the right lower abdomen, considering the possibility of periappendiceal abscess formation. Fourth, other signs that aid in the diagnosis are: closed-hole internal muscle test, lumbar major muscle test and colonic inflation test.