What is Vitiligo? Causes, Symptoms and Treatment
SkinChange.AI
Medical editorial team
Vitiligo is an autoimmune skin condition that causes characteristic white patches on the skin. It affects people of all ages, skin tones and backgrounds — and despite not being medically dangerous, it can have a profound impact on self-esteem and quality of life.
In this article, we explain exactly what vitiligo is, what causes it, who gets it, and what you can do about it.
What is vitiligo?
Vitiligo is a non-contagious skin condition that occurs when the immune system mistakenly attacks and destroys melanocytes — the pigment-producing cells in the skin. The result is smooth, white patches (depigmented areas) that can appear anywhere on the body.
It is important to emphasise: vitiligo is not caused by anything you have done wrong, and it does not pose a threat to your overall health. It is classified as ED63.0 in the WHO's ICD-11.
What does vitiligo look like?
Vitiligo can present in various ways depending on the person and type:
- White, smooth patches: The depigmented areas are usually clearly defined and can range from a few millimetres to large parts of the body. They can appear on the face, hands, arms, legs and genitals.
- Hair loss in depigmented areas: In some cases, hair growing in the vitiligo-affected areas also loses its colour and becomes white or grey.
- Loss of pigment in mucous membranes: Vitiligo can also affect the mucous membranes inside the mouth and nose.
The condition may be limited to one area (focal vitiligo), appear symmetrically on both sides of the body (bilateral/generalised vitiligo), or follow nerve pathways (segmental vitiligo).
Why does vitiligo happen?
The exact cause is not yet fully understood, but research points to a combination of factors:
Autoimmune reaction
The primary mechanism is autoimmune: T-lymphocytes (white blood cells) mistakenly identify melanocytes as foreign and attack them. This leads to progressive destruction of the pigment cells and the emergence of the characteristic white patches.
Genetic predisposition
Vitiligo occurs more frequently in certain families, suggesting a genetic component. Around 20–30% of people with vitiligo have at least one family member with the same condition. Specific gene variants linked to immune regulation have been identified in research.
Triggering factors
Certain factors can trigger or worsen vitiligo in genetically predisposed individuals: severe stress or emotional trauma, skin injury (Köbner phenomenon — new patches appear at the site of injury), sunburn, and exposure to certain chemicals.
Associated with other autoimmune conditions
Vitiligo is associated with an increased risk of other autoimmune diseases, including thyroid disease (Hashimoto's thyroiditis, Graves' disease), alopecia areata (patchy hair loss) and lupus. Regular monitoring for these conditions is recommended.
Who gets vitiligo?
Vitiligo affects approximately 1–2% of the world's population — regardless of race, ethnicity, gender or age. However, certain patterns emerge:
- Onset in young adulthood: Half of all cases begin before the age of 20, and many people notice their first patches during their teenage years.
- Family history: The risk is elevated if close family members have vitiligo or other autoimmune diseases.
- All skin types: Vitiligo occurs in everyone, but is often more visible — and therefore more psychologically distressing — in people with darker skin tones.
What can you do about vitiligo?
There is no known cure for vitiligo, but a range of treatment options can help slow the spread and in some cases restore some pigmentation:
💊 Topical corticosteroids and immunomodulators
Steroid creams can reduce the immune attack on melanocytes and promote repigmentation, particularly for early and active patches. Calcineurin inhibitors (tacrolimus, pimecrolimus) are an alternative for sensitive areas such as the face.
☀️ Light therapy (photochemotherapy)
Narrowband UVB (nbUVB) light therapy is currently the standard treatment for widespread vitiligo. It stimulates the remaining melanocytes to produce pigment again. PUVA treatment (UVA + psoralen) is used in specific cases.
🧬 New biological treatments
Ruxolitinib (JAK inhibitor) is a newly approved topical treatment that blocks the immune pathway destroying melanocytes. The treatment has shown promising results for repigmentation and is available in Europe.
🩹 Surgical options
For stable vitiligo, skin grafting or melanocyte transplantation may be considered. These methods are suitable for limited, inactive vitiligo and require specialist referral.
🧴 Sun protection and camouflage
Depigmented areas lack the natural sun filter melanin and burn easily. Always use sunscreen with high SPF (50+) on affected areas. Medical camouflage makeup can effectively cover the patches and improve quality of life.
Medical classification: Vitiligo is classified as ED63.0 in the WHO's International Classification of Diseases (ICD-11). It is characterised by autoimmune destruction of melanocytes leading to depigmented patches. Treatment includes phototherapy and topical steroids.
Frequently asked questions
Is vitiligo dangerous?
Vitiligo is not medically dangerous and does not affect overall health. However, the white patches increase the risk of sunburn, and the condition is associated with a slightly increased risk of other autoimmune diseases such as thyroid disease.
Can vitiligo be cured?
There is no known cure for vitiligo. However, many treatments can slow the spread and help restore some pigmentation, particularly with light therapy and new JAK inhibitors. Results vary from person to person.
When should I contact a dermatologist?
Contact a dermatologist as soon as you notice white patches or depigmented areas. Early treatment gives the best chance of slowing the spread and achieving repigmentation. A dermatologist can also rule out other causes of depigmentation.
Get a diagnosis within 48 hours
Upload photos of your skin via the SKIND app and receive a personal diagnosis and treatment plan from a certified dermatologist — no hospital waiting list.
Disclaimer: This article is for informational purposes only and does not replace professional medical advice. Always consult a dermatologist for personal guidance.