Contact Urticaria Syndrome

Contact urticaria is an immediate but transient localized swelling and redness that occurs on the skin after direct contact with an offending substance. It is caused by a variety of compounds, such as foods, preservatives, fragrances, plant and animal products, metals, and rubber latex and the mechanism by which these provoke an immediate urticarial rash at the area of contact can be divided into two categories: non-immunological contact urticaria and immunological (allergic) contact urticaria.