The fatigue related to chronic food allergy usually starts as intermittent episodes in association with some other allergic manifestation, especially gastrointestinal symptoms, headaches or nasal allergy. It is usually more pronounced in the early morning, often decreases as the day progresses, and occurs despite a full night of sound sleep. Unlike exercise-related fatigue, there is a permanent, pre-exertion fatigue or weakness which often requires a distinct effort or 'push' to get you started. There are often cognitive difficulties, with memory impairment, mental sluggishness, and an inability to concentrate or maintain attention. Various degrees of depression may exist as well as muscle aching and soreness or drawing sensations in groups of muscles. Sometimes there is edema, especially puffiness of the eyelids and fullness and discoloration of the infraorbital (below-eye) areas.

Although sensitivity to wheat, corn, milk and eggs is most common, any food eaten regularly may be an offender.

Good Laboratories for this kind of testing currently are:
Immuno Laboratories
Great Smokies Diagnostic Laboratories