Is there a history of dermatitis, pre-existing skin issues (psoriasis, wounds, etc.)? Laboratory abnormalities consistent with other etiologies (e.g., eosinophils on complete blood count, liver function abnormalities)
Does the patient appear uncomfortable? Does the patient appear unwell? Is there an obvious rash? Is the patient scratching during the visit? Is skin integrity intact? Are there skin changes? Xerosis Changes in skin pigment or color Is there oral involvement of the rash?