The patient tried lotions, cortisone cream, and oral Benadryl without relief. The patient reported that the rash worsened with heat and improved with ice packs. On the primary survey, vitals were stable, but the presence of dark erythema on the bilateral upper arms was visible. The patien...
The 2 most important factors for narrowing a differential diagnosis are (1) the presence of absence of a primary skin rash and (2) whether the itch is localized or generalized, both of which the answers to can then guide the clinician’s approach to workup and eventual diagnosis and ...