Always complete a full body skin exam for patients' with undiagnosed skin rashes to see full picture and help rule out scabies infestation.
Avoid "anchoring bias." Consider a full list of differential diagnoses even if the patient's previous provider made a diagnosis (if the patient is not improving with appropriate treatment for the previously diagnosed condition).
Consider patch testing for chronic hand eczema when: it is new onset (> 3 months), acute worsening, and refractory to conservative treatment.