Databases for monitoring patients with contact dermatitis have become indispensable for managing a constantly increasing variety of products which cause allergic and toxic dermatitis. As a result of collaboration between the Department of Dermatology and Department of Information Technology, Ullevål Hospital, we now have developed a database for registering patients with occupational dermatitis. The programming tool is DataEase, which contains files for the patients' personal data, site of the dermatitis, results of tests and diagnosis.