The typical pain characteristics of appendicitis are mainly as follows: 1. Patients may have metastatic right lower abdominal pain. Patients with appendicitis mainly show pain and discomfort under the glabella and around the umbilicus at the beginning of the disease, which is progressively aggravated with the inflammation of the appendix. After 6-8 hours of onset, the patient’s pain site can be gradually shifted from the upper abdomen and navel to the appendix body projection in the right lower abdomen, and metastatic right lower abdominal pain is one of the typical symptoms of appendicitis. As early patients only complain of upper abdominal pain, if no careful physical examination is performed, the diagnosis may be missed. 2. Fixed pressure pain in the right lower abdomen, once the acute inflammation of the appendix occurs, patients with appendicitis may have different degrees of pressure pain in the right lower abdomen, and the location of the pressure pain will not change with time, so fixed pressure pain in the right lower abdomen is one of the most important bases for diagnosing acute appendicitis.