There's a black circle on my iphone screen?

I accidentally put a little water onto my phone and when I wiped it off there was a small circle on it. I touched it and it sort of became bigger. I can still see my screen but the area with the spot makes it a lot lighter than the area around it. I'm just a little scared that the spot will turn into something really bad. And I can't go and fix it cuz I just got my glass fixed from when I dropped it. Can someone just tell me what the spot is? And how to fix it.

Please contact your mobile phone branded customer care for change your display.

You can ask APPLE handset vendors or service center to help you solve. Good luck to you!
http://www.ausosoft.com/mac.html

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