Asus zenfone 6 display damage

My smartphone Asus zenfone 6z has got a little yellow mark on the top of the display from yesterday onwards.
The touch of the phone has no problem.
Is this problem comes under warranty??
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Could you take a picture of this issue, please?
My smartphone Asus zenfone 6z has got a small
yellow mark on the top of the display from yesterday onwards.
The touch of the phone has no problem.
Is this problem comes under warranty??
I would visit a service center if I were you and let them determine if it is a warranty issue or not