Abdominal flank bulge is not uncommon in clinic, it is often mixed up with incisional hernia and lumbar hernia, Flank bulge is caused by the looseness, weakness or even defect of the myofascial tissue of the abdominal wall, which causes the contents of the abdominal cavity to protrude outward. This article will classify the abdominal flank bulge based on the cause of abdominal bulging and the weak size of the abdominal wall, and develop a diagnosis and treatment program to improve the understanding and treatment effect of abdominal flank bulging based on years of clinical experience.