Most of the vascular nevus can be cured by themselves after its formation, and a few patients cannot subside by themselves. 1. Vascular nevus is mostly caused by abnormal proliferation of vascular network or malformation of vascular wall during embryonic development, and it is mostly seen in infants. Most patients’ vascular naevus can be cured by themselves without special treatment, but a few patients can’t subside by themselves. 2. When the vascular nevus increases in size, treatment should be taken actively to avoid its rupture and bleeding. At present, laser and liquid nitrogen freezing can be used to destroy the local tissues or make the blood vessels occluded so as to achieve the therapeutic effect, and the local blood vessels can be repaired through surgical operation. It is suggested that patients with vascular nevus should go to regular hospitals and choose the appropriate treatment under the doctor’s guidance in order to get the best therapeutic effect.