Allergies have become widespread over the past several decades. Allergic dermatitis (itchy rash) is the most common skin condition in children younger than eleven, and the percentage of children diagnosed with it increased more than 300% from the 1960s to the 1990s. (Read more.) Hay fever (allergic rhinitis) is believed to affect up to 40 percent of children. Each day approximately ten thousand American children miss school because of hay fever, for a total of 2 million lost school days a year. (Read more.) And roughly 6 percent of children suffer from food allergies, according to the CDC.

Learn more about allergies using the following resources:

• National Library of Medicine
• American Academy of Allergy, Asthma, and Immunology
• Asthma and Allergy Foundation of America
• National Institute of Allergy and Infectious Diseases
• WebMD Allergies Health Center
• Everyday Health's Allergy Hub

Learn about potential environmental links and ways to reduce your child’s risk here.