Diseases are not formed without a reason, they are triggered by the decline of some of their own functions. So, how does hemangioma form? And how to prevent the occurrence of hemangioma? The formation of hemangioma Hemangioma is due to the small arteries and veins anastomosing each other and become a kind of spongy hemangioma with tortuous, pulsatile, also can be said to be a kind of arteriovenous fistula and cavernous hemangioma of mixed tumors occurring in the subcutaneous tissues, the beginning of the limitation of the lumps, but gradually expanding the invasion, as a result of the tumor cavity is gradually deepened, and even with the bone marrow cavity to communicate with each other. It develops on the scalp and may grow and expand rapidly after the birth of the infant. Destruction of the outer plate of the skull. It invades the veins of the plate barrier. And it communicates with intracranial venous sinus; the mass beats obviously, and the thick blood vessels which are curved in the form of rosary can be seen; if the hair stops in the limbs, huge spongy mass can be formed, which will cause difficulties in treatment. Avoiding the occurrence of hemangioma 1, preventing hemangioma should be done by quitting smoking and limiting alcohol, because nicotine in cigarette can make the concentration of cholesterol and low-density lipoprotein in blood rise, causing atherosclerosis. Long-term alcohol consumption will promote the synthesis of cholesterol in the liver and lead to atherosclerosis. 2, usually should pay more attention to scientific diet, maintain good eating habits, improve dietary structure, vascular sclerosis can be delayed and reversed. 3.Frequently do some appropriate exercise, because moderate exercise not only can be fit and strong, but also can enhance the elasticity of blood vessels, keep blood vessels soft. Strenuous exercise may lead to rupture of the more fragile blood vessels and should be avoided. 4.Peace of mind is one of the effective measures to prevent hemangioma, because the emotion of great happiness and great anger can cause the fluctuation of blood pressure and damage the elasticity of blood vessels, thus accelerating the aging of blood vessels. 5.In order to avoid the occurrence of hemangioma, one should go to the hospital for examination regularly. Regular body check, pay attention to the abnormality of blood pressure, blood lipid, blood viscosity and other indexes, in order to prevent atherosclerosis, reduce the occurrence of cardiovascular diseases, and achieve the purpose of prolonging life.