Red nevus generally refers to vascular nevus, which belongs to a kind of benign tumor and usually does not cause serious harm to the body. Vascular nevus is a congenital developmental abnormality and a relatively common benign tumor, which is divided into hemangioma and vascular malformation according to its type. Vascular nevus will not cause serious harm to the body except for its aesthetic effect. For those vascular nevi that affect aesthetics, they can be removed by laser treatment, cryotherapy, and surgery. The majority of vascular naevus can go away on their own and have a good prognosis. For those vascular nevi that grow abnormally or break or bleed due to repeated irritation, symptomatic treatment is usually needed, and they should be removed under the guidance of a doctor if necessary. It is recommended that patients with red nevus go to the hospital, specifically can consult the doctor, follow the doctor’s instructions for treatment.