Preterm babies with an eye in the tailbone are considered to be skin depressions, dermal sinus, and so on. 1. Skin depression: due to the growth and development of preterm babies is not particularly mature, there may be some skin depression, it will look like an eye, this situation does not require special treatment, generally with the growth and development of the baby will gradually disappear. 2. dermal sinus: this is a medullary canal residual or sacrococcygeal suture developmental malformation, some patients are asymptomatic, the fistula is shallow, not connected with the vertebral canal, with the growth and development, the symptoms will become milder, can not be dealt with for the time being. Some patients combined with spina bifida, spina bifida, etc., the main manifestation is that there are abnormal long hairs around the junction, the color is darker, some patients will be combined with capillary hemangiomatous changes, and the fistula is connected with the vertebral canal. Premature babies with an eye on the tailbone are recommended to go to the hospital for a detailed examination, and if treatment is needed it should be done as soon as possible to avoid causing infections or resulting in dysplasia.