Skin Allergy Patch Test on Back of PatientAtopic eczema is due to a hypersensitivity reaction (similar to an allergy) in the skin, which leads to long-term inflammation of the skin. It is most common in infants. People with eczema often have asthma or hay fever, too. There is often a family history of allergic conditions such as asthma, hay fever, or eczema. A meta-analysis or review of published randomized, double-blind, placebo-controlled studies was published in the British Journal of Nutrition (Epublished ahead of print July 26, 2011). It found that maternal supplementing with probiotics during pregnancy tended to prevent atopic eczema in children between the ages of two and seven.