How can you check to see if your baby has allergies? My son has been having a stuffy nose and sniffles for a long time and we are getting kind of worried.

A stuffy nose and sniffles? And it's not just a cold? Have you been to the doctor? How long has he been sniffling? Have you changed anything in his environment or elminated foods?

Allergy Nation (http://www.child.com/child/story.jhtml?storyid=/templatedata/child/story/data/1173889980546.xml)
As schools grapple with peanut-free lunch tables, children's food allergies are transforming the culture of parenting. Child investigates the new food fight.

How can you check to see if your baby has allergies? My son has been having a stuffy nose and sniffles for a long time and we are getting kind of worried.

just see what your doctors say. There are tests they can run to check for allergies

If his stuffy nose and sniffles have lasted a long time, I'm surprised your doctor hasn't already tested for allergies. You might want to insist on it, or at least suggest it.