Stains in the screen

That looks like the peeling anti-reflective coating. If the laptop is less than four years old you have Apple replace the Display for free under a "secret" free repair program:

https://www.macrumors.com/2017/11/17/apple-extends-free-staingate-repairs/

If the laptop is more than four years old, then you will have to live with the issue and just be glad it isn't occurring on the center of the screen. Just minimize touching or cleaning the Display to minimize the coating from peeling from the viewable center area of the screen.

Carlosilva wrote:

Hi,

Latelly I've detected these stains in my mac book pro, in the uper part of the screen.

How to get rid of this?

(and please do not reply sending me to the apple tech support, I know they exist!)

Hard to tell from here what "these stains" are.

Hard to tell from an image. See if this applies:

Delamination of anti-gloss retina coating… - Apple Community