Contact allergy: an update.

Contact allergies are common cause of eczema in all age groups and are one of the most common causes of occupational disability. Contact dermatitis (CD) can be divided into irritant and allergic contact dermatitis. Distinguishing between irritant and allergic triggers of CD by clinical and histologic examinations can be challenging. The approach to patients with CD should consist of a detailed (work and leisure) history, skin examination, patch tests with allergens based on history, physical examination, education on materials that contain the allergen and adequate therapy and prevention.