Laser can usually treat nevus of bright red, patients need to take into account their own situation and ask the doctor’s guidance. Nevus erythematosus is composed of capillaries with developmental deformity, which usually exists at birth. It can appear on the face, neck and other parts of the body, manifesting as light red or dark red plaques of different sizes. Some patients’ lesions gradually develop with age, and may deepen in color, thickening of lesions, and the appearance of nodules. Laser treatment is the first choice for treating nevus erythematosus, laser can be selectively absorbed by hemoglobin in the blood, which can produce photothermal effect, selectively destroying the diseased blood vessels, with less damage to normal skin. For patients who have the need for laser treatment of nevus erythematosus, they should adopt suitable laser treatment such as dye laser under the guidance of professional doctors according to their own conditions. It is recommended that patients suffering from nevus erythematosus should consult a doctor in time and follow the doctor’s instructions.