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Clinical history. The diagnosis is based on a thorough interview which includes history of skin diseases, occupation, items of personal use, characteristics of the workplace, causes of exacerbation and improvement, development time and severity of the lesions.
Epicutaneous or patch tests. When an allergen mechanism is suspected as the cause of the clinical picture, this type of test is carried out as the standard diagnostic method. Epicutaneous tests consist of re-exposing the patient to the suspected allergens under controlled conditions. They are indicated in the study of some skin diseases (such as atopic dermatitis, psoriasis, etc.) to rule out types of contact dermatitis that aggravate the picture, especially in cases that do not correctly respond to the usual treatments, or when the course of the disease is not as expected.
Obtaining positive results does not necessarily imply that the allergen obtained is the cause of the lesions that are being studied, as they should be evaluated in the context of the patient’s medical history.
Sara Gómez ArmayonesDermatologistDermatologist Department
Published: 25 May 2020
Updated: 25 May 2020
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