A peanut allergy is a reaction that occurs when your body mistakenly identifies peanuts as a harmful substance. When you eat peanuts or food that contains peanuts, your body's immune system overreacts. This can cause a serious response and even can cause death.
A good way to prevent an allergic reaction is to avoid the foods that cause it. Peanuts might be found in chili and vegetable oils. An allergy doctor or a dietitian may be able to help you understand which foods might be okay and what to avoid. Learn what to do if you have a reaction.