The causes of neonatal hemangioma are not very clear. Based on current research, the main considerations are related to the following factors: i. Genetic factors. The baby’s parents, grandparents or grandparents, who are related by blood, also have this condition, and this is a familial hemangioma. Secondly, it is related to the abnormal development of blood vessels. During the embryonic period, the baby’s blood vessels develop abnormally and then form hemangioma. After birth, the abnormal blood vessels in the skin or internal organs are manifested. Third, it is considered to be related to hormones. Hormones are mainly the influence of maternal hormones, estrogen and progesterone. Some babies are born without hemangioma or not obvious, and then slowly grow up, and then slowly fade away after a few months, so some of them are related to hormones.