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Exercise-induced anaphylaxis and urticaria.

A W Nichols1

  • 1Department of Community and Family Medicine, University of California, School of Medicine, San Diego.

Clinics in Sports Medicine
|April 1, 1992
PubMed
Summary
This summary is machine-generated.

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Exercise-induced anaphylaxis (EIA) involves urticaria and potentially life-threatening symptoms like bronchospasm and hypotension. Understanding its distinct forms, cholinergic urticaria (CU) and classic EIA, aids in effective management and prevention strategies.

Area of Science:

  • Allergy and Immunology
  • Dermatology
  • Exercise Physiology

Background:

  • Physical exercise can trigger urticaria and anaphylaxis in susceptible individuals.
  • Exercise-induced anaphylaxis (EIA) presents with cutaneous symptoms and can progress to severe systemic reactions.
  • Atopic individuals are more prone to EIA, which involves mast cell degranulation and histamine release.

Purpose of the Study:

  • To differentiate between distinct forms of exercise-induced anaphylaxis.
  • To elucidate the mechanisms underlying EIA and cholinergic urticaria (CU).
  • To outline current treatment and prophylactic strategies for EIA.

Main Methods:

  • Review of clinical manifestations and triggers of EIA.
  • Analysis of pathophysiological mechanisms involving mast cell degranulation.

Related Experiment Videos

  • Comparison of clinical features between CU and classic EIA.

    • Main Results:

    • EIA encompasses at least two distinct conditions: CU and classic EIA, with a possible variant form.
    • CU is triggered by increased body temperature (exercise or passive warming), while classic EIA is exercise-only induced.
    • Classic EIA is associated with larger skin lesions and a higher risk of severe systemic reactions like shock.

    Conclusions:

    • EIA results from mast cell degranulation, releasing histamine and other mediators.
    • CU involves a cholinergic response to warming, whereas classic EIA's mechanism remains largely unknown.
    • Management includes acute treatment (epinephrine, antihistamines) and prophylaxis (avoidance, medications, tolerance induction).