Topics Discussed: dermatology; pruritus.
Sections: Atopic Dermatitis, Contact Dermatitis, Pediculosis, Scabies, Papular Urticaria, Urticaria, Erythema Multiforme, References.
- In infant atopy, cheeks and extensor surfaces of the legs are most commonly affected. Later in childhood, the antecubital and popliteal fossae are effected.
- Sudden onset of severe itching with similar complaints from other family members should raise your suspicion of scabies even if burrows are not visible.
- Urticaria tend to disappear and reappear over different areas of the body; whereas, erythema multiforme are fixed lesions. Subcutaneous epinephrine clears urticaria; however, it does not affect erythema multiforme.
- StevensJohnson syndrome and toxic epidermal necrolysis differ from erythema multiforme in that there is mucosal involvement and systemic symptoms are present. All three entities can be caused by a variety of drugs and infections.
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