Black dot on top of my zflip 3

[sal123321]

Hello a black dot has appeared on my galaxy zflip 3 on top of my screen does. Does anybody know what this is. There is no colour it just stays black and only at the top of my screen. 

[sal123321]

Hi this is how it looks I think it has gotten bigger than before.

[Fiona26]

Does look to be dead pixels, or damaged faulty display. Worth contacting Samsung if you still have warranty, see what they say. Dead pixels can get worse.

[AndrewL]

@sal123321: If you head to the Phone app, dial *#0*# into the Keypad, and select Red, Green and Blue from the series of grey tiles, is the spot visible in any of these tests? To eliminate the possibility of it being a floating notification, try restarting the device or heading to Settings > Notifications > Advanced settings > Floating notifications > Off. 

[Neo001]

By any chance have you enabled Assistant menu in Settings > Accessibility > Interaction and dexterity > Assistant menu? It looks similar to the one that I have, just that mine is on the side and is white and is set to fade away when not in use.

[sal123321]

I dialed *#0*# the black spot is still there when I select red green and blue.

[sal123321]

I've checked I think it is something wrong inside the screen.