Congenital vascular malformations, as the name implies, are vascular malformations that are formed during growth and development from birth. The main manifestation is the thickening and growth of one limb, accompanied by localized skin erythema and increased temperature, and some patients may have varicose veins. We should pay special attention to this part clinically, don’t see the varicose veins on the surface of the body and easily go for the surgery according to the common varicose veins, otherwise the symptoms will be further aggravated after the surgery.