The main causes of long head growth in children include the following conditions. First, it is caused by the genetic inheritance of the child’s parents. If both parents have a long head, the child’s head will also grow longer under the influence of genes, which is determined by genetic factors and is a normal phenomenon. Secondly, the symptoms caused by children suffering from vitamin D deficiency rickets. If the child grows especially fast and parents do not give the child timely vitamin D supplementation, it will cause vitamin D deficiency rickets, the child will appear square cranium, chicken chest and other symptoms, the occurrence of square cranium will also cause the head to grow very long situation. Finally, if a child has hydrocephalus, it can also cause a long head and requires timely surgical treatment.