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Only condition images were generated using AI for illustrative purposes. They do not represent real clients.
Vitiligo
Vitiligo is an autoimmune condition that causes white, depigmented patches where the skin has lost its colour. It is not painful, not contagious and not physically dangerous, but it can carry a real emotional weight.
What Happens in the Skin
Skin colour comes from melanocytes, the cells that produce pigment. In vitiligo, the immune system mistakenly targets and destroys these cells, so the affected skin stops making pigment. Where melanocytes are lost, a pale or white patch appears, with no other change in how the skin feels.
Why does vitiligo appear?
Vitiligo develops when cytotoxic immune cells turn against melanocytes, often on an autoimmune and genetic background. Several factors can set this process in motion or push it along, which helps explain why patterns and timing differ so much from one person to another.
An Autoimmune Attack on Pigment Cells
The core driver is the immune system itself. Cytotoxic CD8+ T cells, signalling through messengers like interferon-gamma and the JAK-STAT pathway, treat melanocytes as a threat and destroy them. Because the cells that make pigment are gone in those areas, the skin can no longer produce colour there.
A Broader Autoimmune and Genetic Background
Vitiligo often runs alongside other autoimmune conditions, such as those affecting the thyroid, and tends to have a genetic component. Many people with vitiligo have relatives with the condition or with related autoimmune concerns, which is part of why some individuals are more predisposed than others.
Oxidative Stress and Specific Triggers
Melanocytes under oxidative stress appear more vulnerable to immune attack. Specific events, including sunburn, skin trauma and periods of significant stress, can help set off the process or make existing patches expand, though these factors vary widely and cannot fully predict how the condition will behave.
The Köbner Phenomenon (Injured Skin)
Like psoriasis, vitiligo can appear on skin that has been injured, a pattern known as the Köbner phenomenon. Cuts, friction and procedures that wound the skin can sometimes prompt new patches in affected areas. This is an important precaution to review with a physician before any skin treatment.
Sun exposure and contrast changes
Sun exposure does not directly cause vitiligo, but tanning of surrounding skin can increase contrast between normal and depigmented areas, making patches more visible. Depigmented skin also lacks melanin protection and is more vulnerable to UV-related damage and sunburn.
How to Prevent
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