A hernia is an organ or tissue in the body that leaves its normal anatomical position and enters another part of the body through a weak point defect or orifice formed congenitally or acquired, commonly umbilical hernia and inguinal hernia. Umbilical hernias are more common in infants and children, most of which can heal themselves and are relatively large and can be treated surgically when the child is about 1 year old; masses located in the inguinal region and some reaching the scrotum or labia are called inguinal hernias and most require surgical treatment. Most hernias are found during diaper changes. In older infants, most are found during bathing. After vigorous crying and movement, a soft mass appears in the umbilicus, groin and perineum, which disappears after rest or quietly, or in some cases it may be accompanied by abdominal distention, vomiting and painful crying. The common factors that cause hernias in children, such as crying, coughing, defecation and urination, are mostly in the small intestine in boys, so the protruding organ feels soft to the touch and is often accompanied by a gurgling murmur when retracted; in girls, the protruding ovary is the main cause, so a thumb-sized hard and mostly painful lump can often be felt. Some children may have constipation, loss of appetite, vomiting, etc. Some children may be crying and restless, and a large hernia may cause mobility problems. These are the clinical symptoms of a hernia, and prompt medical attention is needed.