Description of vitiligo 

In segmental vitiligo (also known as unilateral or localised vitiligo), the white patches only affect one area of your body.
Segmental vitiligo is less common than non-segmental vitiligo, although it's more common in children. It usually starts earlier and affects 3 in 10 children with vitiligo.

What causes vitiligo?
Vitiligo is caused by the lack of a pigment called melanin in the skin. Melanin is produced by skin cells called melanocytes, and it gives your skin its colour.

In vitiligo, there are not enough working melanocytes to produce enough melanin in your skin. This causes white patches to develop on your skin or hair. It's not clear exactly why the melanocytes disappear from the affected areas of skin.

Autoimmune conditions

Non-segmental vitiligo (the most common type) is thought to be an autoimmune condition.
In autoimmune conditions, the immune system does not work properly. Instead of attacking foreign cells, such as viruses, your immune system attacks your body's healthy cells and tissue.

If you have non-segmental vitiligo, your immune system destroys the melanocyte skin cells that make melanin.
Vitiligo is also associated with other autoimmune conditions, such as hyperthyroidism (an overactive thyroid gland), but not everyone with vitiligo will develop these conditions.

Some details about Peninsula Medical LED 308nm light device

Parameters for the device

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