The vitiligo is a skin disease that, suddenly, he is of white, especially on the face arms and chest. The causes are due to the total disappearance of melanin (the pigment of the skin) in some parts of the body. It happens that a systematic destruction of melanocytes by the body. The immune cells that act as anti-melatonin, but if they know the actual cause. In some cases it may be hereditary, but in most cases can be triggered by stress or nervous factors. E ‘for example, the typical appearance of vitiligo in children after the birth of a brother.