The screen is some blurry white.

I would like to know if someone can guess what happens with the screen. At the beginning I saw it at the left-down corner and now it happens at side and a little bit at the upper-left corner. Thanks!

Thanks for all your answers. I just remember that before it got blurry white, I forgot it in the car under the sun and when opening, I saw some kind of glue coming out from the screen. is it possible that glue touched the screen? And I think that is cooling glue for the laptop.