Bright red nevus is a disease caused by vascular malformation, mainly manifested as light red or dark red patches on the surface of the skin, and the symptoms can be effectively relieved by laser treatment at present. The commonly used laser treatment is Pulsed Dye Laser (PDL), which is based on the concept of selective photothermolysis, using oxygenated hemoglobin as the target chromophore to improve the symptoms; PDL treatment irreversibly destroys the capillary wall and causes little damage to the epidermal layer overlying it, thus fading the wine discoloration without leaving a scar. In addition to PDL therapy, you can also choose long-pulse Nd:YAG laser and other treatments. It should be noted that there are certain adverse reactions after laser treatment, such as local skin inflammation, edema, hyperpigmentation, hypopigmentation, etc. If these symptoms are not relieved for a long time, it is necessary to go to the regular medical institutions for consultation and treatment in time.