Tough question: Specific foods can trigger eczema (milk, wheat, eggs, nuts for example), but traditional tests for food allergy may not catch the association. If concerned, see an Allergist. Usually the identification depends on single-food elimination trials to determine effects. Neck itchiness can be due to eczema or just dryness of skin. Use good moisturizer (eg CeraVe) post luke-warm bathing and later in day.
Answered 11/12/2015
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