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| • | urticaria (rule out drug) |
| • | urticarial bullous pemphigoid |
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top 5 categories (extensive) ddx for "urticarial":
| • | “serum sickness-like” (prodrome of hep B) |
|
| • | urticarial stage of bullous disease |
| • | Eosinophilic cellulitis (Well’s syndrome) |
| • | EPF and bites (papular urticaria) |
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should be clinically distinct:
thoughts:
| • | eosinophils (bites, urticarial BP, EPF, eosinophilic cellulitis) give you urticarial lesions, |
| • | Also, most vascular reaction pattern diseases (EM, EPF, Still’s disease/ erythema marginatum, serum sickness). look urticarial at some point (because most of the vascular reaction pattern has eosinophils or neutrophils) |
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