Port wine nevus, also known as wine-like nevus or telangiectasia nevus, often occurs at birth or shortly after birth, usually on the face, neck and scalp, mostly unilateral, occasionally bilateral, and sometimes involving mucous membranes. At the initial stage of injury, there are several reddish, dark red or purplish red spots with irregular and clear boundaries, which are not higher than the skin surface. The capillaries are dilated, partially or completely faded, and the surface is smooth. With the increase of age, the color turns red and purple, and the focus of 65% patients will gradually expand, and it will thicken before the age of 40, and nodules will appear, which is easy to bleed after trauma. There are many treatments for nevus flammeus. The treatment of nevus flammeus depends on patients of different ages, different parts and different degrees. It is recommended to go to a regular hospital and make a treatment plan under the guidance of a doctor.