The location of the appendix is in the right lower abdomen in most people, very few people congenital abnormal intestinal rotation, resulting in the appendix in the left lower abdomen, in the clinic is almost rare to see the appendix in the left lower abdomen. Appendicitis pain is lower right abdominal pain, typical performance is the beginning of the epigastric or umbilical stomach vague pain, a few hours later the pain shifted to the lower right abdomen, for the lower right abdomen persistent pain, some have paroxysmal aggravation. The right lower abdomen can be pressed with the hand can have obvious pressure pain, hand release has obvious rebound pain, CT can be seen appendicitis swelling, blood routine suggests that there is an infection. Most people appendicitis is the right lower abdominal pain, if the patient appears to the left side of the pain clinical consideration is not appendicitis, may be other organs of the lesion, if other lesions can not explain the left side of the pain, clinically do CT can see the swelling of the appendix, a very small number of people appendix congenital anomalies in the left lower abdomen, CT can be seen in the left lower abdominal appendix of the appendicitis will appear in the left lower abdomen, this is a very rare situation! Very rare.