Sensitive Skin Field Guide

Patch testing

4 articles

When Home Patch Testing Isn't Enough

A home arm test tells you whether one product is tolerable. Clinical patch testing by a dermatologist identifies the allergen. How they differ, and when to book.

Contact Dermatitis: How to Identify the Cause

How to identify the cause of contact dermatitis: the difference between irritant and allergic types, how patch testing works, and practical steps to narrow down the culprit.