I like to take my dwarf hamster outside when its ...

It might be because of light. Maybe his eyes just need a chance to adjust. Try taking him out under a tree in the shade.

he soes this because of the light and the sudden change in temp.. he is just getting used to it. as long as he still moves around like usual then he is ok.

I am sure his  nnatural instincts tell him he is  in  his  natural habitat    a place to burrow, smell real dirt,  smell  green  grass,   feel  rain  and wind onhis body  being caged up  maybe in a  smoky house is not  his liking but most  hamsters have no choice. maybe you can  build a   circular fence  right on top of the grass and let him stay there for hours with a shelter maybe a cardboard  box..