The described rash most likely represents a
hypersensitivity reaction that is most often seen in children younger than
10 years. Erythema multiforme is an acute hypersensitivity reaction that
can be caused by various infections or medications. Fixed drug eruptions
occur in the same cutaneous site after re-exposure to an offending
medication. Hereditary angioedema is characterized by recurrent bouts
of swelling that can involve the face, extremities, and gastrointestinal
tract. Urticaria, commonly known as hives, is characterized by
well-demarcated skin wheals.
- Erythema nodosum.
1. Zitelli BJ, Davis HW, editors. Atlas of pediatric physical diagnosis.
3rd ed. St. Louis: Mosby-Wolfe; 1997.
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