Thanks for posting your query to HCM.
It seems from your query that your are suffering from the problem of "Vitiligo" or simply known as white skin disese.
Vitiligo or white skin disease is an skin problem where the color giving cells are damaged and are not able to produce color to the skin. The resulting condition is manifested as slight decreased pigmentation at first and then slowly and finally progresses to complete white skin problem.
As you got the mechanism of this disease so don't get panicky about the problem as it is not at all contagious disease or not going to cause any harm to anything in the body. Therefore first of all kindly do not feel ashamed and scared of this condition.
It may be of different types ranging from a small patch to generalized forms. In yours it appears as generalized one which is spreading (Progressive).
There are multiple types of oral and topical treatments or combination treatment available to take care of the problem.
The treatment should only be started by an experienced dermatologist
and you must have good patience of multiple of months to see the visible results. It is completely treatable with long term follow up and patience.
Hope these informations are helpful.
"Wish you good health"
Dr Sanjay Kumar Kanodia