Vitiligo: What It Is, Why It Happens, and When to See a Doctor
Medically reviewed by Dr. Yousef Binamer — Consultant
Vitiligo is an immune-related condition in which the immune system affects the pigment-producing cells (melanocytes), the cells responsible for making melanin — the pigment that gives skin its natural color. When these cells are affected, well-defined white patches appear on the skin. Vitiligo is not contagious, and it is not caused by any particular food or by poor hygiene. Its patches can appear anywhere on the body, but they often begin on the hands, the face, and around body openings such as the eyes and mouth.
What is vitiligo and how does it appear?
Melanin is the pigment that determines the color of skin and hair, and it is produced by the melanocytes found in the surface layer of the skin. In vitiligo, the skin loses this pigment in specific areas because the melanocytes stop working or become damaged, so patches appear that are lighter than the surrounding skin or completely white. The edges of these patches are often clear and well-defined, and they may start small and then change in size over time. Vitiligo is usually painless, but skin that has lost its pigment is more sensitive to sunlight, which makes sun protection helpful.
Where does vitiligo appear on the body?
Vitiligo can appear on any area of the body, but it tends to show up in certain places more than others, including:
- The hands and fingers, and the backs of the hands.
- The face, especially around the eyes and mouth.
- Areas around body openings.
- Places exposed to friction or repeated injury.
Vitiligo may be limited to a single patch or several patches, and in many people it appears symmetrically on both sides of the body. The extent of involvement varies greatly from person to person.
Is vitiligo contagious, or is it linked to food and hygiene?
No. Vitiligo is not an infection, and it does not spread through touch, handshakes, shared items, food, or swimming. It is not caused by poor nutrition or poor hygiene. These misconceptions can embarrass the person affected or lead others to keep an unwarranted distance, even though vitiligo is tied to the person's own immune system and poses no risk to those around them.
Is vitiligo linked to other conditions?
Vitiligo can occur alongside some other autoimmune conditions. The one most often mentioned in the medical literature is thyroid disease, an association that points to a shared immune susceptibility in some people. This does not mean that everyone with vitiligo will develop a thyroid problem, but it is a reason for the doctor to pay attention to accompanying symptoms and to request tests if that seems appropriate after assessment.
How does vitiligo change over time?
The course of vitiligo is unpredictable. Patches may stay stable for long periods, widen, or appear in new areas; in some cases, some color partially returns. There is no reliable way to predict an individual's course, so follow-up with a dermatologist can help track changes and guide discussion of suitable options.
What is the psychological and social impact of vitiligo?
Although vitiligo usually causes no physical pain, it can have psychological and social effects, especially when patches appear on the face or hands. Tell your doctor about embarrassment or anxiety related to the patches when discussing the condition and ways to manage its impact.
What does the research point to?
A case series from a specialized Saudi medical center in Riyadh, published in the International Journal of Dermatology, described eight people who developed vitiligo while receiving interferon, an immune-stimulating medicine used at the time to treat hepatitis C. The observation supports the possibility that immune activation may bring out vitiligo in predisposed people; the study was not about treating vitiligo.
When should you see a doctor?
See a dermatologist when:
- New white patches appear, to confirm the diagnosis, because other skin conditions can look similar to vitiligo and need to be distinguished.
- Patches spread quickly, or new patches appear over a short period.
- Accompanying symptoms are present, such as persistent fatigue or symptoms that may be linked to the thyroid.
- Psychological or social impact, or a wish to understand the condition and follow-up options properly.
A dermatologist determines the diagnosis and follow-up plan after examining the patches and considering their extent and the person's overall health.
Source: A case series from a specialized Saudi center on the appearance of vitiligo during interferon treatment in hepatitis C patients, published in the International Journal of Dermatology (2010) — DOI: 10.1111/j.1365-4632.2009.04443.x
Frequently asked questions
Is vitiligo contagious?
No. Vitiligo is not contagious at all and does not spread through touch, handshakes, shared items, food, or swimming. It is a condition tied to the person's own immune system.
Does vitiligo always spread?
No. The course of vitiligo is unpredictable and varies from person to person. Patches may stay stable, widen, or partially regain color in some cases. There is no reliable way to predict this in advance.
Is vitiligo linked to the thyroid?
Vitiligo can occur alongside some autoimmune conditions, the most commonly mentioned being thyroid disease. This does not mean it happens to everyone, but it is a reason for the doctor to watch for accompanying symptoms.
Is vitiligo caused by food or vitamin deficiency?
Vitiligo is an immune-related condition, not the result of a particular food or poor hygiene. These common claims are inaccurate.
Is vitiligo painful?
Vitiligo is usually not painful, but skin that has lost its pigment is more sensitive to the sun, and the psychological impact can be real and worth discussing with a doctor.