Okay, we had allergy test bloodwork done on DD, and it came back w\/ positive reactions for codfish, eggs, and peanuts, and nothing else.\n\nSo, we've eliminated those from her diet (and reduced them in mine).\n\nBut though she didn't test positive for airborne allergens, she still develops a runny nose within 1\/2 hr. of getting to the park. It wasn't cold yesterday, so that doesn't account for it.\n\nCould it just be sensitivity to air pollution? We live in a major metro area not known for its clean air. How do I figure this stuff out and help DD?