Heal House Vitiligo Research 74 · Review
Why does vitiligo occur and how is it treated?
Vitiligo
In short
Vitiligo is a disease in which the body's immune system mistakenly attacks the pigment cells in the skin. It affects about 3 to 4 in 1,000 people worldwide. In recent years, new treatments that can reverse the progression of the disease have also emerged.
I have long thought it would be good to have everything you want to know about vitiligo organized in one place. It was time to tie together scattered knowledge—why it occurs, why it spreads, and what treatments are available—based on the latest evidence. So vitiligo researchers from around the world published a comprehensive overview of vitiligo in Nature Reviews Disease Primers. I participated as a co-author. This article serves as a guide for patients and as an up-to-date map for dermatologists.
Q1 What Causes Vitiligo?
It occurs when the body's immune system mistakenly identifies the skin's pigment cells (melanocytes) as enemies and attacks them. Underlying this is a genetic predisposition. Several genes involved in immunity and pigmentation are implicated. Environmental factors then act as triggers. First, pigment cells become stressed, and then the immune system is sequentially activated to attack them intensively. In particular, immune cells that remain at the site for a long time (memory T cells) play a key role. If this process continues, the pigment cells in the skin disappear. The ability of stem cells to produce new pigment cells also declines. Vitiligo is classified into three types based on the distribution of white patches: nonsegmental, segmental, and mixed.
Three types of vitiligo
| Type | Characteristics |
|---|---|
| Nonsegmental (most common) | Appears symmetrically on both sides of the body; strong autoimmune nature |
| Segmental | Appears only in a specific area on one side of the body |
| Mixed type | A combination of nonsegmental and segmental types |
Q2 How Is Vitiligo Treated?
There are three goals: stop further loss of color, restore color, and maintain the restored color for a long time. To achieve these, we consider it important to discuss with you and choose a method that fits your situation together. Established treatments, including phototherapy, form a solid foundation. In addition, in the last two years, new treatments that can reverse disease progression itself have been approved. Furthermore, new drugs that modulate immunity and help pigment cells regrow are being actively tested in clinical trials. This means that vitiligo is becoming a disease that can be treated much more actively than before.
Q3 Is Vitiligo Only a Skin Problem?
No. Although it appears externally as white patches on the skin, vitiligo also deeply affects the mind and daily life. It is not a rare disease, affecting about 3 to 4 in 1,000 people. Because the visible changes are significant, many people also experience self-consciousness, depression, or difficulty meeting others. Therefore, just as important as treating the white patches is addressing the emotional burden they cause.
Closing remarks
This article is a review that serves as a map, compiled by researchers worldwide, covering everything from the causes of vitiligo to the latest treatments. In particular, with the emergence of treatments that can reverse disease progression in recent years, the perspective on vitiligo is shifting from "unavoidable" to "actively manageable." It serves as a reliable reference for both patients and doctors like me to gauge the direction ahead.
