Appendicitis can be painful, and, typically, appendicitis presents with pain that begins in the upper abdomen, then gradually moves to the umbilicus and, after a few hours, to the right lower abdomen, where it becomes fixed. Usually, the symptoms of abdominal pain vary with different types of appendicitis, for example, a patient with simple appendicitis presents with mild vague pain. Suppurative appendicitis presents with mild paroxysmal swelling or severe pain. Gangrenous appendicitis presents with severe abdominal pain. In perforated appendicitis, the patient’s abdominal pain may be temporarily relieved because of a sudden decrease in pressure in the appendiceal lumen, but it may increase sharply with the subsequent development of peritonitis. Therefore, once a patient develops appendicitis, he or she needs to be diagnosed and surgically treated in a timely manner to avoid delaying the patient’s condition.