There are several main causes of right lower abdominal pain: the first is spasmodic pain caused by acute enteritis. The second is acute appendicitis, the typical manifestation is metastatic right lower abdominal pain, initially in the upper middle abdominal pain, about 6-8 hours later will be transferred to the right lower abdominal, there is obvious pressure pain and rebound pain of the Mai’s point. The third is the right lower abdominal pain caused by the right urinary ureteral stone. For female patients, it is necessary to exclude: the first is ectopic pregnancy; the second is ovarian cyst torsion; the third is the right lower abdominal pain caused by corpus luteum rupture.