Millions of Americans suffer from headaches, stomach problems, an other ailments like shortness of breath, abdominal pain, or even more long-term ailments like eczema and hypoglecimia. What's worse, these ailments often go untreated and undiagnosed because the cause is unclear. According to Dr. Stephen Wanger, the answer for many of these people could be simple food allergy, but it is difficult to detect. Joyce talks with Dr. Wangen about how to approach a discussion of food allergies with your physician.