How do you approach patients who develop eczema flare after food exposure?

It depends on the timing of the eczema flare; if there are other immediate symptoms, it could be an IgE-mediated reaction. But if it is an isolated, delayed flare of eczema, it is a rare association; management depends on how reproducible the association is and the severity of the eczema. The age of the patient and history of ingestion should also be considered.