UV irradiation therapy has some efficacy in treating vitiligo, but clinical experience shows that oral or topical medication for vitiligo combined with UV irradiation therapy will have better results. You can apply 8-methoxypsoralen orally, and after taking the medicine, irradiate the white spots with long-wave ultraviolet light or sunlight, the intensity of irradiation is appropriate to occur mild erythema. Of course, eye protection is needed during the treatment period, and it will have better results if it lasts for more than six months. You can also use 8-methoxypsoralen solution or ointment applied externally to the white spots, and then irradiate the long-wave ultraviolet light or sunlight after half an hour, mastering the concentration and dose of the drug and the time of irradiation to avoid local phototoxic dermatitis. The actual fact is that you can find a lot of people who are not able to get a lot of money from the internet.