If the patient has pain in the right lower abdomen mainly consider the following causes: First, sigmoid colitis, the body surface mapping site of the sigmoid colon is in the right lower abdomen, sigmoid colon curved part is a high incidence of inflammation, when the mucosa is congested, edema, permeability changes, inflammatory factors secretion abnormalities will lead to a sense of pain, when the violent activity is the internal organs are bumped will also occur severe pain. Second, gynecological diseases, common gynecological inflammation, gynecological tumors. The pain caused by trauma, sharp object injury or blunt object impact may cause damage to the right lower abdomen superficially or subcutaneously, commonly soft tissue contusion, internal organ rupture. Pain caused by intestinal adhesions, usually surgical procedures can lead to pain due to adhesions. Fifth, appendicitis is one of the common acute abdominal conditions, mainly manifested as throbbing pain, rebound pain, and muscle tension.