Most hepatic hemangiomas are cavernous hemangiomas are common benign tumors of the liver, which can occur at any age, but often appear asymptomatic in adults and more in women. Hepatic hemangiomas are the most common benign tumors in the liver, which can be diagnosed in most cases before surgery. There are mainly the following theories: 1. Congenital developmental abnormalities of hepatic hemangioma occur when the endothelial cells of blood vessels grow tumorously, often accompanied by malformations of blood vessels, including arteriovenous malformations and venous malformations, which can occur in both large and small vessels. It is left behind during embryonic development, and some of them can be found at birth. In most people, the tumor grows gradually after adulthood. 2.Estrogen stimulation theory is clinically observed that female puberty, pregnancy and oral contraceptives can accelerate the growth of hemangioma, and the level of estrogen in infants and children with hemangioma is also increased, so hormone is a pathogenic factor of hemangioma. 3.Other theories are that after the infection of capillary tissue, local necrosis of liver tissue leads to vascular expansion and deformation, resulting in capillary expansion and regional blood circulation stagnation in the liver, resulting in sponge-like expansion of blood vessels.