Wood’s lamp white is not necessarily vitiligo, Wood’s lamp white can be used as an auxiliary diagnosis of vitiligo, but can not be used as a way to confirm the diagnosis, the patient needs to be combined with dermatoscopy and other tests to determine whether it is vitiligo. Wood’s lamp is a kind of ultraviolet light, Wood’s lamp bright white can not necessarily be diagnosed as vitiligo, but can be used as an auxiliary way to determine whether it is vitiligo. The general patient is in vitiligo progressive stage when the Wood’s lamp examination local skin gray-white fluorescence, the lesion and the surrounding tissue border is not clear. If the vitiligo is in the stable stage of Wood’s lamp examination, there will be blue-white fluorescence, and the lesions and the surrounding tissue border clear, some patients will also appear edge of the hyperpigmentation or pigmentation island. Patients who want to confirm the diagnosis of vitiligo also need to do dermoscopy, histopathological examination, reflective confocal microscopy, thyroglobulin antibodies and other tests. Wood’s lamp bright white is not necessarily vitiligo, but has the significance of suggesting vitiligo, for patients suspected of vitiligo need to consult a doctor in a timely manner, the doctor will be based on the results of the examination and the patient’s symptoms to determine whether or not vitiligo.