Vitiligo

Qu'est-ce que le vitiligo ?

Vitiligo is due to a lack of colour (pigment) in the affected areas of the skin. Vitiligo does not cause any other symptoms. However, the appearance of vitiligo can be distressing. This is particularly so for darker-skinned people where white patches are more noticeable.

Areas of skin with patches of vitiligo have no or very few melanocytes. The melanocytes are either damaged or destroyed in the body. Therefore, melanin cannot be made and the colour of the skin is lost. It is not known why the melanocytes go from affected areas of the skin.

They may be destroyed by the immune system or self-destruct for reasons not yet known. It is thought to be an autoimmune condition. This means that the immune system (which normally protects the body from infections) causes damage. In the case of vitiligo, it destroys the cells in the skin that make melanin.

To understand the cause of vitiligo, it is useful to have a basic understanding of the skin. The skin has two layers - the epidermis and the dermis. Beneath the dermis is a layer of fat and then the deeper structures such as muscles and tendons.

Skin diagram cross-section view

There are cells called melanocytes in the bottom of the epidermis which make a pigment called melanin. The melanin is passed to the nearby skin cells, which colours the skin and protects them from the sun's rays.

Melanin causes the skin to tan in fair-skinned people. Dark-skinned people have more active melanocytes. The melanocytes are stimulated to make more melanin when exposed to sunlight.

About 1 in 100 people develop vitiligo. Men and women are equally affected. It can develop at any age. However, it begins before the age of 20 years in about half of cases. There is some genetic factor involved and vitiligo may run in the family.

Nearly 1 in 3 affected people have some other family member who is also affected. Vitiligo is not infectious. It is not more common in any racial or ethnic groups. It is more obvious in people with darker skin.

Vitiligo on left hand

© Simone Trovato Monastra, CC BY-SA 4.0, via Wikimedia Commons

The most common areas of skin affected by vitiligo are:

• Visage.

• Neck.

• Hands.

• Wrists.

• Le cuir chevelu.

However, any area of the skin can be affected. Other common sites include the nipples and genitals. Vitiligo can also affect areas where there are body folds, such as the armpits or groins. It may occur in places where the skin has been injured in the past (cuts, burns or other skin conditions).

It may be symmetrical in that patches may appear in similar places on each arm or leg. In the areas of the scalp that are affected, the hair too is affected, causing it to become grey or white. Hair of the body or eyes can also lose colour.

Very rarely, vitiligo can affect the whole body. This is called universal, or complete, vitiligo.

Small areas of milky-white skin usually develop first. The contrast between vitiligo skin and normal skin varies. In fair-skinned people, it may only be noticeable in summer when normal skin tans. The contrast is more noticeable in darker-skinned people.

The course and severity of vitiligo vary from person to person. Sometimes a few small patches develop slowly and progress no further. Sometimes a number of patches develop quite quickly and then remain static for months or years without changing.

However, it is quite common for the white patches gradually to become bigger and for more patches to appear on other parts of the body. Large areas of the skin may eventually be affected.

There is no way of predicting how much of the skin will eventually be affected when the first patch develops. The white patches are usually permanent. Rarely, some patches of vitiligo may regain their colour (re-pigment) and return to normal.

People with vitiligo are usually well. Vitiligo is not sore or itchy. However, the appearance of the skin can be distressing, particularly if the face or the hands are affected. There is no natural protection from the sun in affected areas of the skin. This means that skin affected by vitiligo burns much more easily than normal skin if exposed to sunlight.

Although there is no cure for vitiligo, there are treatments available which can help. Some people may not be concerned about the white patches of skin if they are in areas not noticeable to others.

Some treatments have been shown to slow down the progression of vitiligo; some treatments cause affected skin to return to normal in some cases.

No single treatment for vitiligo works well in all cases. The response to the various treatments is variable and can depend on the type of vitiligo. There are a number of treatments, and specialist advice may be needed to advise on the best one.

Skin camouflage

Skin camouflage uses special coloured cover creams that are put on the white patches of vitiligo. Skin camouflage does not alter the disease but improves the skin's appearance. The aim is to find a colour to match the colour of the skin.

Some special cover creams can be prescribed on the NHS. The creams can disguise vitiligo very well, which may greatly increase self-confidence. A GP may refer a person with vitiligo to the Changing Faces skin camouflage advice service (see below) to help find the right cream.

There are also self-tanning lotions available from pharmacies. These may also hide the vitiligo and can last several days before needing to be reapplied. However, they often do not provide an exact match for each skin colour.

They may be most useful for large areas of vitiligo where matching the colour exactly to nearby skin is not needed so much. Fake tans can also be useful for areas where camouflage is less effective (for example, the back of the hands).

Steroid cream

Des steroid cream, used when a small patch of vitiligo first develops, may prevent a smaller patch from becoming bigger. Occasionally, skin colour may return over a treated area. Steroids work partly by suppressing the immune system (which probably attacks the melanocytes).

Treatments that may be considered by a skin specialist

Tacrolimus or pimecrolimus cream
Tacrolimus ou pimecrolimus creams can be used as an alternative to steroid cream. They have been shown to restore skin colour to some people with vitiligo.

They also work by suppressing cells of the immune system in the skin. It seems to be most effective for vitiligo on the face. It can also be used on the skin of children.

PUVA treatment
PUVA stands for psoralen and ultraviolet A (UVA) light. It involves taking a special medicine (a psoralen) which makes the skin very sensitive to light.

This medicine can be in the form of a tablet or a cream. The skin is then treated with UVA light from a special machine in hospital. This treatment is very time-consuming.

Treatment is needed twice a week for up to two years. PUVA may cause side-effects such as sunburn-type reactions or skin freckling. If colour does return to the white patches there is still a chance that it may go white again at a later stage.

Narrowband UVB phototherapy
This is another light treatment which is now used more commonly than PUVA. It uses ultraviolet B (UVB) light. As with PUVA, treatment is twice a week but it is not necessary to take a medicine to sensitise the skin and the treatment sessions are much shorter.

It is less damaging to the skin than PUVA. It is useful when large areas are affected. Sometimes it is used in combination with tacrolimus or pimecrolimus cream.

Traitements au laser
Laser treatment for vitiligo is currently not available under the NHS as there is no definite proof yet that it is effective.

Skin grafting
Grafting of normal skin to small patches of vitiligo has been tried. It is time-consuming and not always successful or available.

Autres traitements

Complementary treatments
There is currently insufficient evidence to recommend any complementary treatments for vitiligo.

Treatment to remove colour from (de-pigment) the skin completely
In some people with extensive vitiligo, a treatment may be considered to make the remaining normal areas of skin go white.

This makes all the skin an even white colour so it all looks the same. This is done only after a full discussion with a specialist. The removal of all the skin pigment is permanent and it takes up to a year to complete.

White patches cannot tan; they can only burn. Therefore, skin sun protection is very important and sun should be avoided in the hottest times of the day. White patches should be covered with with clothes or a hat where possible, or with high-factor sunblock. For people with vitiligo, some brands of sunblock can be prescribed on the NHS by a doctor.

In fair-skinned people, avoiding tanning of normal skin can make patches of vitiligo much less noticeable.

It is important to avoid any injury to the skin when possible, as new white patches may develop in areas of injury.

Remarque: the use of sunbeds is pas recommended. The ultraviolet radiation from sunbeds can damage the skin and people who use tanning devices are much more likely than average to be at risk of developing skin cancer (melanoma). Therefore, sunbeds should be avoided.

Vitiligo itself does not develop into any other condition. However, other diseases caused by the immune system (autoimmune disorders) are slightly more common in people with vitiligo. Such disorders include:

• Thyroid problems.

• Diabète.

• Anémie pernicieuse.

• A condition where the thyroid gland is overactive is particularly associated with vitiligo.

• Faible estime de soi

• Dépression.

Most people with vitiligo do not have these but a doctor may suggest a blood test to rule them out,

Some people with vitiligo are embarrassed about their condition. This can lead to low self-esteem and even to depression. Some people find that counselling can be beneficial.

Joining a local support group can be a useful way to help understand more about this condition. The Vitiligo Society (see below) has more information on support options.

Your doctor may also recommend you have a blood test every year to check this has not developed.