Why are Leucoderma spots white?

Answer 1

Because the pigment producing cells in the effected area of skin are destroyed by an auto-immune response from the body.

Answer 2

White patches need not always spell doom. Only a fraction of them could be the dreaded Leucoderma. And that too, a majority of the cases are amenable to medical management.
Can Leucoderma be caused by consuming contrasting food items like fish/onions with milk?
Nothing can be further from the truth. This is a myth with absolutely no scientific basis. How this old grandma's tale started is still a matter of speculation. A point that should further strengthen the belief that diet has absolutely nothing to do with Leucoderma is that no dietary restrictions of any kind are imposed on a Leucoderma patient. Vitamin-C rich foods, which were once thought to promote the disease process, are no longer restricted either because of their proven and beneficial role as antioxidants.

Answer 3

Vitiligo (vit-ill-EYE-go) is a pigmentation disorder in which melanocytes (the cells that make pigment) in the skin are destroyed. As a result, white patches appear on the skin in different parts of the body. Similar patches also appear on both the mucous membranes (tissues that line the inside of the mouth and nose), and the retina (inner layer of the eyeball). The hair that grows on areas affected by vitiligo sometimes turns white.

Answer 4

Because no production of melanin /pigmentation on affected spot which are responsible to make colour to skin.

Answer 5

Skin pigments are not there to give skin colour tone. They are destroyed or not able to re produce.