The prognosis of nevus erythematosus is better if it is treated with appropriate and regular treatment in the early stage, generally the skin lesions can be improved by 80-90%; however, post-treatment care is also very important, and the clinical effect varies from person to person. Nevus erythematosus is a kind of congenital capillary malformation disease, the typical lesions are light red, dark red or purplish-red patches of different sizes, which are mainly treated by physical therapy, and can be supplemented by medication and surgery. Since the vascular lesions in childhood are located in the superficial layer of the skin, the clinical effect of regular treatment is better in the late stage. At present, laser treatment is the first choice for the treatment of nevus erythematosus, and commonly used modalities include intense pulsed light, pulsed dye laser, etc. However, it is necessary to carry out this treatment, and the effect has a cumulative effect, and it can be combined with photodynamic therapy, which can improve the therapeutic effect. But after the operation, it is necessary to keep the operation area clean and dry, and pay attention to sun protection. Patients with bright red nevus should go to regular hospitals as early as possible and follow the doctor’s instructions for active treatment.