I'm black and my face starting to turn lighter on my cheeks what does this mean?
Could be vitiligo, which causes skin tone to lighten. It's not contagious or fatal, though it can cause distress about one's appearance, and it's not all that uncommon. I don't know if there's any treatment available.
Have you been in the sun a lot recently? This happens to my daughter if I forget to put block on her face when we're in the sun a lot.