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By Mayo Clinic staffAn 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