Chestnut shedding hair on face?

Every spring when my chestnut sheds out his winter coat he starts to lose the hair between his eyes... and then it turns into black patches of skin for the rest of the summer.

I know it's not serious, because it happens every year (and to other chestnuts at the barn).. but it's just not that nice looking. Does anyone know what it is, or if anything can help it?

Here's a picture:



Thank you!

My horses do this too, but I always thought they were just rubbing their faces

It happens to my bay as well every summer. I don't think you can get anything to stop it or help it. Its just a natural part of their shedding. Don't know why it happens to some horses and not others. Some one might have a better answer than me lol!

Chestnuts are generally darker in the face, and this is natural. My chestnut mare does the same thing.