D90 Why is the photo face exposed unevenly?

Because there is a pimple on the face, the light reflection is different. If you want the same color as your face, you can use PS for post-processing. In my opinion, this will happen if you use a flash to shoot your face into such a standard head portrait. But should the picture be like this?

Photography is the art of light and shadow. From a photographic point of view, the face exposure of this photo is uneven.

If it is not enough, don't average it again.

Some express human nature. Traditional photos pay special attention to light, and what you say is uneven.

That's uneven

. Nowadays, digital cameras are used, and people don't pay much attention to exposure, especially wedding photos must be flat and look beautiful.

This is a disadvantage.

You can use PS to fade, and from the transition between light and light, your face is still a little uneven.

This is not a question of D90, but a question of our aesthetic taste and our understanding of comparative movies.