The swelling of a pediatric hernia can usually recur and disappear on its own when the child is calm, it is also tender when it appears, and the child usually has no pain or other uncomfortable sensations. Usually, after an increase in intra-abdominal pressure such as crying, stooling and bouncing, the child’s inguinal or scrotal mass may not shrink, the parents feel the swelling hard after touching it, and the child’s crying worsens after touching it, and other conditions should be treated immediately at the hospital. This is easier to detect for parents who already know that their child has a hernia; therefore, it is necessary to remind parents who did not know about hernia before to pay attention to observe whether there are any abnormalities in the child’s groin and scrotum when the child has unexplained crying.