LMFAO THATS THE BIGGEST FUCKING LIE I'VE EVER HEARD! You can't be allergic to "grass and trees" in general. Who does this doctor think he is? Next time you see him tell him you went home that day, rolled in some grass, hugged a tree, smoked some weed and took a bath with organic leaves.

Unless of course you really are allergic to that shit. Then thats whack.