If a pediatric syringomyelia becomes hard, it is recommended to go to the hospital for examination and evaluation: 1. If the syringomyelia is combined with bleeding or combined with a hematoma, local hardening can occur, which can be seen as a local bluish or black skin color and accompanied by significant pain, further ultrasound examination is needed to clarify whether there is an accumulation of blood. If there is blood accumulation, hemostatic or anti-infective treatment should be given if necessary, and elective surgery should be performed for complete cure. 2. The opening of the sphincter is very small, so after the amount of sphingomyelia gradually increases, the tension of the surface of the sphincter may rise, which becomes hard to the touch and may cause local pain, but there may not be any conscious symptoms. When the volume gradually decreases after lying down, the volume gradually increases after standing up, and the texture gradually hardens.