Diagnosing Chronic Idiopathic Urticaria (Chronic Hives of Unknown Cause)

• History & Physical Examination

  • Detailed history is most important diagnostic test
    • Review of systems
    • Review of the potential causes for hives
  • Physical exam
  • Laboratory and diagnostic tests only ordered based on clues from history and physical exam

• CIU - a Diagnosis of Exclusion

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