What is the term for touching a product or chemical that causes a skin reaction?

Contact dermatitis is the term used to describe inflammation of the skin that occurs when the skin comes into direct contact with an irritant or allergen. This condition typically manifests as redness, itching, and sometimes blistering in the area of contact. The irritation can be caused by various substances such as chemicals, cosmetics, plants, or other materials that the skin may react to upon exposure.

This definition aligns closely with the premise of the question, as it specifically highlights the relationship between direct contact with a product or chemical and the subsequent skin reaction. In contrast, allergic dermatitis refers more specifically to a reaction involving the immune system's response to allergens, while atopic dermatitis is a chronic skin condition often associated with other allergic conditions like asthma or hay fever. Seborrheic dermatitis, on the other hand, typically involves areas rich in sebaceous (oil) glands, such as the scalp and face, and is characterized by scaly patches and red skin, which is different from the reaction triggered solely by contact with a specific irritant or allergen.