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Vitiligo – Causes, Symptoms and Treatment
Vitiligo is a chronic skin condition characterized by the loss of pigment-producing cells, resulting in white or light patches on the skin. It affects around 1-2% of the global population.
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Vitiligo is a chronic skin condition characterized by the loss of pigment-producing cells, resulting in white or light patches on the skin. It affects around 1-2% of the global population.
What is Vitiligo?
Vitiligo is a chronic, non-contagious skin condition in which the melanocytes – the cells responsible for producing skin pigment – are destroyed. This leads to the appearance of clearly defined, white or depigmented patches on the skin. The condition can develop at any age but most commonly begins before the age of 30. It affects approximately 1–2% of the world population, regardless of ethnicity or gender.
Causes
The exact cause of vitiligo is not yet fully understood. It is considered to be multifactorial:
- Autoimmune response: The immune system mistakenly attacks and destroys the body´s own melanocytes. This is the most widely accepted theory.
- Genetic factors: A family history of vitiligo increases the risk; specific gene variants have been associated with the condition.
- Oxidative stress: An accumulation of reactive oxygen species may damage melanocytes.
- Neurogenic factors: Nerve-derived substances may impair melanocyte function.
- Triggering factors: Emotional stress, sunburn, or skin injury can trigger new patches – a phenomenon known as the Koebner effect.
Symptoms
The hallmark symptom of vitiligo is the appearance of sharply defined, milky-white skin patches caused by the complete loss of pigment. These patches can occur individually or in groups and may grow over time.
- Commonly affected areas: face (around eyes and mouth), hands, forearms, elbows, knees, feet, and genital area
- Whitening of hair in affected skin areas (leukotrichia)
- Usually no pain or itching – the condition is primarily cosmetic in nature
- Increased sensitivity of affected areas to sunlight
Types of Vitiligo
- Vitiligo vulgaris (non-segmental): Most common form; patches appear symmetrically on both sides of the body
- Segmental vitiligo: Affects only one side of the body; often has a more stable course
- Focal vitiligo: One or a few patches limited to a single area
- Universal vitiligo: Rare form where depigmentation covers more than 80% of the body surface
Diagnosis
Diagnosis is typically made clinically by a dermatologist using the following approaches:
- Wood lamp examination: Under UV light, depigmented areas glow bright white, allowing precise delineation of affected skin.
- Dermatoscopy: Magnified examination of skin structures
- Blood tests: To rule out associated autoimmune conditions (e.g., thyroid disease, type 1 diabetes)
- Skin biopsy: In unclear cases, for histological confirmation
Treatment
There is currently no complete cure for vitiligo. Treatment aims to slow disease progression and restore skin pigmentation.
Topical Therapies
- Topical corticosteroids: Anti-inflammatory creams to stabilize the condition and encourage repigmentation
- Calcineurin inhibitors (e.g., tacrolimus, pimecrolimus): Particularly suitable for sensitive areas such as the face
- Topical JAK inhibitors (e.g., ruxolitinib cream): A newer, approved treatment option showing promising repigmentation results
Phototherapy
- Narrowband UVB therapy (NB-UVB): The gold standard of light-based treatment; stimulates remaining melanocytes to repigment the skin
- PUVA therapy: Combination of psoralen and UVA light; less commonly used today
Systemic Therapies
- Systemic corticosteroids for rapidly progressing, active disease
- Systemic JAK inhibitors (e.g., ritlecitinib) – partially approved and under clinical investigation
Surgical Options
- Melanocyte transplantation: Transfer of pigment cells from healthy skin to affected areas in patients with stable disease
Camouflage and Sun Protection
- Medical camouflage makeup for cosmetic coverage of depigmented areas
- Consistent use of sunscreen (SPF 50+) to protect sensitive, depigmented skin
Psychosocial Impact
Vitiligo can cause significant psychological distress, especially when visible areas such as the face or hands are affected. People with vitiligo often experience reduced self-esteem, social anxiety, or depression. Psychological support and peer support groups can greatly improve quality of life.
References
- Ezzedine K, Eleftheriadou V, Whitton M, van Geel N. Vitiligo. Lancet. 2015;386(9988):74-84.
- World Health Organization (WHO). Skin conditions – Vitiligo. Available at: https://www.who.int
- Rodrigues M, Ezzedine K, Hamzavi I, Pandya AG, Harris JE. New discoveries in the pathogenesis and classification of vitiligo. Journal of the American Academy of Dermatology. 2017;77(1):1-13.
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