Exogenous contact eczema has 2 types, allergic and irritant. Allergic eczema: eczema caused by an allergic response to a product applied to the skin surface, while irritant eczema: eczema caused by the irritating effect of a product applied to the skin surface. The most common causes of contact eczema are soap, detergent, etc. in irritant eczema. While chemicals are nickel, latex, scented creams, cosmetics and perfumes in allergic eczema. In the skin patch test (PATCH TEST) used in the diagnosis of allergic contact dermatitis, the patient’s non-lesional dorsal area was covered with an adhesive patch impregnated with up to 20 different allergens and after 48 and 96 hours, the result was negative (-) or + / ++ / +++ / ++++. All medications containing systemic cortisone and antihistamines should be discontinued at least 10 days before this test.