Syringomyelia, commonly known as “watery eggs”, is also a common condition in children. It is not the same disease as hernia, but has a similar pathogenesis to hernia in that it is caused by incomplete closure of the peritoneal sphincter. In hernias, the sphincter is wider and the abdominal organs (mostly intestines) can pass through, whereas in syringomyelia, the sphincter is thinner and only fluid can pass through. Because the contents of syringomyelia are liquid, the swelling is translucent when illuminated with a flashlight (positive transillumination test), whereas the contents of the hernia sac in hernias are intestinal tubes or abdominopelvic organs, and the transillumination test is negative. Syringomyelia is divided into spermatic syringomyelia, testicular syringomyelia, spermatic testicular syringomyelia and traffic syringomyelia according to the location of the swelling. Unlike hernias, pediatric syringomyelia has the potential to heal spontaneously in children under the age of 1-2 years because the unclosed sphincter is generally thin, so syringomyelia under the age of 1 year does not need to be operated on urgently and can be observed; after the age of 2 years, the sphincter has little chance of closing on its own and usually requires surgery. The surgical approach is different from that of adult syringomyelia, which is a syringomyelia reversal, and pediatric syringomyelia, which requires a high sphincter ligation. Cases of recurrence after syringomyelia reversal in children with syringomyelia have been encountered and are worth noting. Syringomyelia and hernias also occur in girls, and the mechanism of their occurrence is the same as in boys. Inguinal syringomyelia, also known as nuck’s canal cyst, is the same in girls as in boys and is treated surgically if it does not disappear after the age of two. Inguinal hernias (hernias) can also occur in girls, and the contents of a girl’s hernia may be the intestinal canal, ovaries, and adnexa. Because of the specificity of the inguinal hernia contents in girls, it is advocated that inguinal hernia in girls should be operated as early as possible to avoid necrosis of the ovaries due to entrapment. Especially in newborns and small infants, parents should observe their children more frequently for swelling in the inguinal region to avoid serious consequences.