The difference between chronic appendicitis and acute appendicitis is that most cases of chronic appendicitis are formed after the treatment of acute appendicitis. Chronic appendicitis and acute appendicitis display different symptoms. Acute appendicitis has typical migratory pain in the lower right abdomen, which initially appears in the upper abdomen and then moves to McBurney's point in the lower right abdomen. Chronic appendicitis, on the other hand, often lacks upper abdominal pain and initially presents with fixed discomfort or vague pain in the lower right abdomen. Only when chronic appendicitis acutely flares up does significant tenderness in the lower right abdomen occur, and rebound pain appears with peritonitis. Chronic appendicitis may also occasionally present with gastrointestinal symptoms such as nausea and vomiting.