Eczema diagnosis begins with a physical examination and is typically supported by a patch test. Allergens identified during the patch test are thoroughly investigated by dermatologists to establish a definitive diagnosis.
During the patch test procedure, low concentrations of allergenic substances are applied to the patient's back using special adhesive patches. These patches are removed after 48 to 72 hours, and the application areas are observed. To ensure the accuracy of the test, it is crucial for the patient not to engage in sports, shower, or participate in similar physical activities that could affect the test during this period. If reactions such as blistering, weeping, or redness are observed in the relevant area as a result of the observation, it is confirmed that the patient has allergic eczema to that substance.