People with severe allergies often carry an epinephrine pen to stop life-threatening reactions. But emergency room doctors may not know that's the best treatment. Paul Rapson/Science Source hide caption

itoggle caption Paul Rapson/Science Source

SafetyTat, the inventor of children's safety tattoos, offers a line of allergy tattoos to help children with food allergies. Courtesy of SafetyTat hide caption

itoggle caption Courtesy of SafetyTat

Researchers are learning more about how to treat milk allergy by giving kids a small amount of milk protein, but it needs further study. MICHAEL PROBST/ASSOCIATED PRESS hide caption

itoggle caption MICHAEL PROBST/ASSOCIATED PRESS

A recent settlement between a university and the Justice Department may encourage institutions to better accommodate students with food allergies. iStockphoto.com hide caption

itoggle caption iStockphoto.com

The iTube platform, left, uses colorimetric assays and a smartphone-based digital reader to detect potential food allergen. A screen capture of the iTube App appears on the right. UCLA hide caption

itoggle caption UCLA

Contact with animals and dirty environments may be one reason farm kids are less likely to get allergies, researchers say. iStockphoto.com hide caption

itoggle caption iStockphoto.com

Peanuts were a problem for 9 percent of households that reported someone with a food allergy or intolerance. iStockphoto.com hide caption

itoggle caption iStockphoto.com