Syringomyelia in children is caused by excessive accumulation of abdominal fluid in the sphincter through the unclosed syringomyelia. Syringomyelia can be seen in all age groups of children, with the majority being boys and girls occasionally having syringomyelia. It is called Nuck’s cyst. The clinical presentation is a mass in the groin or on one or both sides of the scrotum that grows slowly and does not cause pain. If the unclosed syringomyelia is of thicker caliber, the mass may shrink in the morning after lying down overnight. As the sphincter continues to occlude after birth, the lymphatic system of the sheath tends to mature and a small amount of fluid can gradually absorb itself and heal on its own. The younger the child, the less fluid accumulation and the higher the self-healing rate. In older children, fluid accumulation is more frequent and takes longer to heal on its own. If the syringomyelia in infants is not large and the tension is not high, surgery may not be urgently performed, and it may be observed until the age of 1 week and may subside on its own. If the sphincter does not recede after observation or if the volume of effusion increases and the tension is high, it may affect the blood circulation of the testis and lead to testicular atrophy, so surgery is appropriate, regardless of age. The surgical method is high sphincter ligation; simple puncture and aspiration cannot be cured because the sphincter is not ligated and is prone to infection; intrathecal injection of drugs is effective, but it may cause long-term damage to the developing testes of children.