Accidental impacts in life can lead to the loss of human cranial bone. Once such an accident occurs, the brain tissue inside the skull loses its protective shell and comes into direct contact with the outside environment, and is also susceptible to infections from undesirable environmental assaults. Once the skull is damaged, the patient must go to the hospital as soon as possible to receive examination and repair surgery. Otherwise, it is easy to cause the patient’s own burden of thought, and may be accompanied by headache and dizziness and other symptoms. The longer the defect lasts, the higher the chance of secondary brain damage occurring. What do I need to be aware of for cranial repair in children? Cranial repair in children needs to be approached from a number of perspectives. The first is the timing of cranial repair, the earliest neurosurgical guidelines called for cranial repair in children after the age of 18 years. Recently, because of social progress, it has been recommended that children should undergo cranial repair when they are three years old or older, due to the significant impact of cranial defects on children’s learning and lives. If the repair is done too late, as the child’s brain develops, a portion of the child’s brain may expand beyond the area of the skull defect, which may have an impact on the later stages of the surgery and affect the child’s aesthetic appearance. This is the timing of the surgery. On the other hand, it is important to protect the child’s skull during the period of cranial defects before cranial repair is performed. As the brain is not protected by the skull, it is very easy to cause brain damage, and a slight external force to the brain may cause epileptic seizures, so it is recommended to wear a protective hat or helmet in daily life.