Food allergies can be tricky to diagnose.
The first sign for many of these babies is chronic atopic dermatitis or eczema . These dry, scaly patches of skin usually show up on the face, kneecaps, and elbows. This process is what triggers the symptoms above. If your baby ever seems to be having trouble breathing or passes out after eating, call 911 right away. He could be having a severe allergic reaction and will need immediate medical assistance.