Birthmarks are mainly divided into vascular and pigmented types, which are caused by congenital developmental abnormalities. They can be removed by medication, surgery and physical therapy. Vascular type mainly includes bright red nevus, strawberry-like hemangioma, etc., which mainly appear red and purple. Pigmented type mainly includes nevus of Ota, coffee spot, congenital pigmented nevus, etc., which mainly appear brown, brown, yellow, etc. How to remove the birthmark can be decided according to the size, location, depth of skin tissue involved and other factors: i. Drug treatment: infants and children patients use more, such as propranolol treatment suitable for superficial hemangioma, glucocorticoids are often used to treat rapidly proliferating hemangioma. For smaller capillary hemangiomas and cavernous hemangiomas, drugs such as polyglaucine or sodium cod liver oil solution can be injected into the bottom of the blood vessels to make them harden and fall off, and the effect of drug treatment generally varies from person to person. Physical therapy: 1, laser therapy: commonly used pulse laser, carbon dioxide laser, etc., depending on the situation may need to carry out 3 times or more to achieve better results; 2, cold nitrogen therapy: mainly frozen liquid nitrogen, placed on the surface of the birthmark, so that the surface cells of the birthmark necrosis, so as to achieve the effect of removing the birthmark, but this method is easy to leave a scar, it is recommended to use discretion. Surgical treatment: For larger nevus or hemangioma, surgical excision can be chosen for treatment, but this method is easy to leave a scar. Generally, if the birthmark does not grow on the head and face, or if it does not affect the patient’s aesthetics much, it can be removed without surgery. If you have aesthetic needs, you can consult your doctor to choose the right way to remove it.