1.Hazards of nevus: The lighter ones only affect the beauty, but the more serious ones can lead to crooked mouth and slanted face, and even endanger the normal function of organs. Without treatment, the nevus will generally accompany the patient for life, seriously affecting the appearance, quality of life, working environment and social relationship, causing low self-esteem, psychological harm and mental torture, which is why the poem “A thousand years of red face is full of bitterness and sorrow, and the ancient celebrities are helpless”. 2, the harm of strawberry hemangioma: (1) strawberry hemangioma affects the beauty. (2) Strawberry hemangioma is susceptible to rupture due to external impact and compression, causing hemorrhage and more than blood flow. (3) Strawberry hemangioma can damage the surrounding tissues, causing deformity and affecting the function of organs. (4) Hemangioma may cause abnormal bone growth and development. (5) Ulceration of the tumor may occur. (6) Severe deformity of limbs. (7) Strawberry hemangioma has a hereditary tendency.