Hepatic hemangioma is actually a relatively common benign tumor of the liver. In recent years, as people’s awareness of health checkups has increased and various diagnostic imaging techniques have advanced, the detection rate of small asymptomatic hemangiomas has increased significantly. So what exactly causes hemangioma? The causes of hemangioma are still unclear, but there are several theories as follows: 1. congenital abnormal development: hemangioma is caused by congenital malformation of the terminal blood vessels of the liver, which is generally believed to be due to abnormal development of liver blood vessels during embryonic development; 2. hormonal stimulation theory: female puberty, pregnancy and oral contraceptives can accelerate the growth rate of hemangioma; 3. other theories: such as capillary tissue Infection deformation, resulting in capillary expansion, local necrosis of liver tissue after the expansion of blood vessels to form a vacuole, its surrounding blood vessels congestion and expansion; and some other factors such as: bad emotions, stressful life, bad habits, etc. are also factors that cause hepatic hemangioma. Second, under what circumstances should surgery be considered? When the hemangioma increases to 125px or more, there may be: 1. abdominal mass; 2. gastrointestinal symptoms, vague pain and discomfort in the right upper abdomen, nausea, belching; 3. compression symptoms, huge hemangioma will produce compression to the surrounding tissues and organs; 4. rupture and bleeding of hepatic hemangioma, which may cause severe pain in the upper abdomen; 5. cause abnormalities in coagulation mechanism, etc.