I don't think this is a bald spot.It's just camera light hiting the back of his head.In the other photo also(the one that the shat and the kid)it is also light effect(otherwise the kid is also balding).

I don't think this is a bald spot.It's just camera light hiting the back of his head.In the other photo also(the one that the shat and the kid)it is also light effect(otherwise the kid is also balding).