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Understanding Anaphylaxis -- Symptoms

What Are the Symptoms of Anaphylaxis?

Anaphylaxis may begin with severe itching of the eyes or face and, usually within minutes of exposure to the allergen, progressing to the following symptoms:

  • Swelling of the throat, lips, and tongue
  • Difficulty breathing, caused by swelling of the throat and narrowing of the airways
  • Difficulty swallowing
  • Hives
  • Generalized flushing (redness and warmth) of the skin
  • Abdominal cramps and nausea
  • Increased heart rate
  • Sudden weakness
  • Drop in blood pressure
  • Vomiting or diarrhea
  • Swelling throughout the body
  • Shock
  • Unconsciousness


Understanding Anaphylaxis

Find out more about anaphylaxis:



Diagnosis and Treatment


WebMD Medical Reference

Reviewed by Luqman Seidu, MD on March 16, 2014

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