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in this series, dr. rohan bissoondath, founder and medical director of preventous cosmetic medicine & preventous collaborative health, answers your questions about skin health.
vitiligo is a skin discolouration condition that affects one per cent of the population and causes different areas of the skin — and sometimes body hair — to lose colour, or even turn white. perhaps the most recent and well known example of someone with vitiligo, who has brought the condition into the spotlight, is canadian model
winnie harlow.
winnie harlow at the 77th golden globe awards in california, january 5, 2020.
reuters/mario anzuoni
doctors and researchers are not 100 per cent sure what causes vitiligo, but the leading theory is that it is caused by an autoimmune response, essentially meaning that the body’s immune system is attacking the healthy cells that give skin its natural colour, destroying those pigment cells and causing skin discolouration as a result.
in a small percentage of cases (about 10 to 20 per cent), vitiligo will go away on its own over time, but for the majority of people, the condition is likely to spread to more areas of the skin, especially if left untreated.
vitiligo typically affects different areas of the body from person to person and is divided into two main subgroups — segmental and non-segmental.
non-segmental vitiligo is the most common form of vitiligo, which encompasses several patterns of distribution, including generalized (anywhere on the body and symmetrical in pattern), acrofacial (face, fingers, toes, hands, arms, legs), mucosal (lips, inner nose or genital mucosal surfaces) and universal (all or most of the skin surface).
segmental vitiligo is a subgroup of vitiligo, is the least common, and affects specific segments of the skin called dermatomes, or “nerves.” our bodies are divided into dermatomes based on the distribution of spinal nerves. segmental vitiligo affects only one area of the body on only one side, without crossing the midline of the body usually on the front or back.