Contact Dermatitis: Practice Gaps and Challenges.

Patch testing remains the criterion standard for diagnosing allergic contact dermatitis. A thorough and detailed history, proper selection of allergens and testing procedure, as well as education of patients are all key parts of this procedure and important in the successful management of those suspected of having allergic contact dermatitis. Physicians must also be aware of the continual introduction of new chemicals that are potential new allergens and adjust screening allergens appropriately.