A problem on the screen

My computer has a problem on the screen. After half an hour of use strange white glare that remain in the bottom begins to appear.
When disconnecting the unit from one day to the next, but these glosses disappear within a half hour of use reappear.
Why does it happen? Will it be a failure of manufacture?
The device is 2013
What should I do

Hi Jaimistik,
Welcome to the Apple Support Communities!
I know it is concerning when you have display issues on your MacBook Pro. In this situation, I would recommend the troubleshooting steps located in the attached article. If your issue remains unresolved, it may be necessary to contact Apple support by following the links at the bottom of the article.
Apple computers: Troubleshooting issues with video on internal or external displays
http://support.apple.com/kb/HT1573
Have a great day,
Joe

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