Inguinal hernia in children is mainly caused by elevated pressure in the abdominal cavity, insufficient strength of abdominal wall muscles, and non-closure of the sheath. 1. Elevated abdominal pressure: If the baby has a violent crying, exercise or long-term constipation, resulting in increased abdominal pressure, it may suddenly induce inguinal hernia. 2. Insufficient muscle strength of the abdominal wall: children’s development is still immature, the abdominal wall has defects or muscle weakness, in the case of increased abdominal pressure, easy to lead to intestinal tubes, large omentum and other protruding and the formation of hernia. 3. The sheath is not closed: for babies less than 6 months old, there may be incomplete closure of the sheath, resulting in the abdominal contents along the unclosed sheath into the groin or scrotum and the formation of a hernia. Inguinal hernia in children may also have other causes, it is recommended to go to the hospital in a timely manner, improve the examination to determine the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.