Peanut Allergy

Peanut allergies happen when your body mistakes peanut protein for something harmful. Your immune system responds by causing an allergic reaction, which could include hives, vomiting and swelling.

Peanut allergies are the most common food-related cause of anaphylaxis, which can lead to swelling in your airways or a severe drop in blood pressure. Call 911 (or your local emergency service number) or get to an emergency room immediately if you have face, mouth or throat swelling, difficulty breathing or swallowing, or feel faint.

Are peanuts the same a tree nuts?

No. Peanut allergies aren’t the same as tree nut allergies (which include cashews, walnuts, hazelnuts, pecans, pistachios and Brazil nuts). Peanuts are legumes and grow in the ground. But some people are allergic to peanuts and some or all tree nuts.