The disease can be identified by a specialist after examining the characteristic skin changes. Analysing the medical history of the patient is another important measure regarding the diagnosis of vitiligo. In certain cases especially in lighter skin colour, an ultraviolet lamp, known as wood’s lamp, may be used to check the white patches. This instrument with ultraviolet light causes the areas of skin with less pigment to glow prominent
Rarely, a skin biopsy may be required to examine your skin and confirm the diagnosis and rule out other conditions. Blood tests are required to rule out metabolic disorders, thyroid disorders and vitamin deficiencies.