There are actually many kinds of birthmarks of newborns, but most of them will gradually fade with the growth of newborns. For example, hemangiomas usually occur at birth and may develop further with age. However, as children continue to grow up, some hemangiomas may gradually shrink and subside. If it still doesn't subside, it can be treated with laser or surgery. In the middle, if the hemangioma of the newborn continues to expand and grow, external application of drugs can be used to control the growth of hemangioma. If it is a pigmented birthmark such as an animal skin mole, it should be surgically removed as soon as possible, usually when the child is in labor for 3-6 months. Because if the mole of animal skin is not treated in time, some may have a malignant reaction.