About 1 to 2 percent of the world's population, or 40 to 50 million people, have Vitiligo. In the United States, 2 to 5 million people have the disorder. Ninety-five percent of people who have Vitiligo develop it before their 40th birthday. The disorder affects all races and both sexes equally.
Vitiligo itself is of two types.
1) NSV (Non-Segmental Vitiligo)
2) SV (Segmental Vitiligo)
NSV (Non-Segmental Vitiligo)
As the name suggests, in non-segmental Vitiligo causes the white patches on to the body in some or more symmetrical patterns . In NSV the patients have new white patches on various parts of the body from time to time as a result a major portion of the body ends up affected by Vitiligo.
SV (Segmental Vitiligo)
whereas in segmental Vitiligo there is not any particular symmetry or pattern
In most of the cases, Vitiligo is thought to be an autoimmune disease. It means that your immune system does not work properly as it should be working. Instead of defending from outside attacks like foreign cells, bacteria etc your immune system produces antibodies that attack your body’s own healthy cells and tissue which ultimately cause Vitiligo. Another cause, in an affected person, exposure to certain chemicals (for example in your job) might cause a skin reaction with the chemicals, and leads to white patches developing on skin. This is sometimes called occupational or contact Vitiligo. Vitiligo can run in families and genetically inherited. About one in three people who have Vitiligo also have a relative who is affected by the condition. Sometimes Vitiligo can be caused by severe sunburn.
Many people with Vitiligo can feel depressed and start lacking confidence because of their white spots. These people are tensed and want to get back their lost skin pigmentation. For such people a number of therapies are available. The most proven techniques out of these are UV therapy and herbal treatments.