Every parent wants their child to be healthy and active, and to look beautiful and lovely. However, sometimes God does not want it and some children are troubled by birthmarks at birth. Which children will have birthmarks? Why do they have birthmarks? There is no way to predict it. The birthmarks are not related to the mother’s violation of some taboos during the birth and pregnancy, as the folk custom says. The birthmark of an infant can be said to be the kiss of God. I. What is a birthmark? Birthmarks, medically known as maternal spots or moles, are abnormal growths of skin tissue during development that appear as abnormalities in shape and color on the skin surface. Birthmarks can be found at birth or may appear slowly after the first few months of life. The birthmark can be divided into pigmented and vascular type. 1, pigmented type: including nevus of Ota, coffee milk spot and so on. 2, vascular type: including bright red and vascular type. 2.Vascular type: including nevus, strawberry-like hemangioma, etc. The following are some common birthmarks 1.Mongolian spots: common in Asian people, rare in Caucasian and black people. Clinical manifestations: often occur in the sacral tail or buttocks, blue-black patches with clear edges. 2.Nevus of Ota: clinical manifestations: the lesions are located in the area innervated by the Ⅰ and Ⅱ branches of the trigeminal nerve on the face. The basic damage is patchy, with color ranging from brown, greenish gray, cyan to purple or greenish black, and spots of different sizes are sometimes distributed in the center or periphery of the patch. The mucous membrane of eyes, ears, nose, mouth, throat and other parts can also be involved. 3.Milk coffee spot (coffee spot for short): sparsely confined rash or patches of different shapes, light brown to brown, uniform in color, with clear borders, mostly seen in newborns, visible on any part of the body 4.Vivid nevus (also a kind of hemangioma): Vivid nevus, also known as wine-like nevus or capillary dilated nevus, appears at birth, usually on the face and neck, is a common congenital, low blood flow dermal vascular malformation. It is a common congenital, low blood flow vascular malformation in the dermis, mostly present at birth, and rarely fades on its own. 5.Hemangioma: Hemangioma is a congenital benign tumor or vascular malformation, mostly seen in infants at birth or soon after birth, and the hemangiomas occurring in the oral and maxillofacial area account for 60% of the hemangiomas in the whole body, most of which occur in the facial skin, subcutaneous tissue and oral mucosa, such as tongue, lips and floor of mouth, and a few occur in the jaw bone or deep tissue. 6.Congenital pigmented nevus: about 1% of newborns will have this kind of nevus. It has irregular shape, small ones are about several millimeters in diameter, and large ones can invade the whole back, neck or whole limbs. These moles may develop into skin cancer and should be treated if the area is large. Most people may think that birthmarks are not painful or itchy and will not harm the body, so they don’t need to take care of them. This understanding is one-sided, but birthmarks are still very harmful to people, mainly in psychological and physical aspects. The majority of birthmarks affect the beauty of newborns. If the birthmark grows on the face, hands and feet and other obvious parts, it is disturbing and some people have low self-esteem, which will make the affected children suffer a great blow psychologically; especially children, who are more likely to have low self-esteem or autistic tendencies in the process of growth. According to studies in Europe and America, birthmarks on the face can affect the psychological development of children and turn into personality problems later. Some birthmarks can be combined with abnormalities of body organs and even have the possibility of malignant changes, which must be treated actively. For example, some sponge-like hemangiomas can cause limb disfigurement and dysfunction if they proliferate too fast, and even tissue necrosis and excessive consumption of platelets can lead to low coagulation and bleeding. Some animal skin-like moles with hair growth may later develop malignant melanoma cancer, and the cancer cells metastasize and lead to death. V. Treatment methods of birthmarks: 1. Dermabrasion or surgery is a traditional method of treating birthmarks. Some birthmarks such as hemangioma can be treated by injection therapy or interventional therapy. At present, the use of laser therapy is the most common method of treating birthmarks. Laser therapy method is to use the selective photothermal effect of light on objects of different colors, applying different wavelengths of laser light to selectively act on melanocytes in the skin or hemoglobin in the blood vessels, so that the lesions are destroyed by photothermal force without destroying other skin tissues, thus achieving the purpose of treatment. Laser treatment method has high safety and small or even no scars after treatment, and will not affect the physiological function of normal organism, so it is a very good method to treat some birthmarks (especially for some birthmarks such as nevus of Ota, coffee spot, bright red nevus, capillary hemangioma, etc.).