What If The Rash Is In Your Diet

What If The Rash Is In Your Diet

March 31, 2026 · 31 min

About this episode

The episode discusses systemic contact dermatitis and its relation to diet and skin allergies.

A rash after you eat something feels simple, but skin allergy rarely is. We sit down with board-certified dermatologist and Mohs surgeon Dr. Carsten Hamann to break down systemic contact dermatitis, a lesser-known form of allergic contact dermatitis where reactions can be triggered not just by skin contact, but sometimes by ingestion. We unpack how this differs from true food allergy, why eczema and allergy can look identical, and why nickel—found in both products and foods—is such a common a...

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