Tiny black dot on iPhone 5s screen?

I just dropped my phone. It fell on the screen. The screen isn't cracked and there doesn't appear to be any new scratches. Now there's a tiny black dot on the screen that won't go away.

Either a stuck pixel, or it could be a spot if the liquid crystal display (lcd) fluid. If it smashes discolors and changes shape, it's the LCD fluid, if it stays no matter where you touch around it, screen orientation, then it's most likely a stuck pixel.

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