Is there a big possibility of this being Vitiligo?

Hello, I have been getting these white patches on my face, they're pretty big and they are slowly getting lighter. I also have a few spots on my legs, which I have been having for a while, but those don't really change. My grandpa from my dads side has vitiligo, is there a big possibility this is vitiligo or can it be something else? If it is, is there any way it can be prevented from spreading, or how can I treat this?

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