Vitiligo isn’t the most deadly thing that you can come down with, like other diseases though you don’t want to get it. Vitiligo is the loss of skin pigmentation in patches. This disease and several others are as a result of an auto-immune attack, which actually occurs by your own body’s immune system, specifically on skin melanocytes.
The severity of the noticeability of the patches is different among all people, and varies greatly with the natural skin color of your body. For example if naturally your sking color is quite dark, light patches are going to be much more noticeable then if your skin is a light shade to begin with.
As always it is recommended to visit a physician immediately if you suspect that you have Vitiligo. This can save you from burns, and help to protect your body, from skin damage,etc.