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Symptoms

By Mayo Clinic staff

An allergic response to peanuts usually occurs within minutes after exposure, and signs and symptoms range from mild stomach or skin reactions to anaphylaxis, a life-threatening reaction that can constrict the airways and block breathing.

Common symptoms
Signs and symptoms of peanut allergy can include:

  • Skin reactions such as hives, redness or swelling
  • Itching or tingling in or around the mouth and throat
  • Digestive problems such as diarrhea, stomach cramps, nausea or vomiting
  • Tightening of the chest
  • Shortness of breath or wheezing
  • Runny or stuffy nose

Anaphylaxis
Peanut allergy is the most common cause of anaphylaxis, a medical emergency that requires treatment with an epinephrine (adrenaline) injector (EpiPen, Twinject) and a trip to the emergency room. Signs and symptoms start soon after consuming peanuts and can include:

  • Constriction of airways, including a swollen throat that makes it difficult to breathe
  • Shock, with a severe drop in blood pressure
  • Rapid pulse
  • Dizziness, lightheadedness or loss of consciousness

DS00710

April 26, 2008

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