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The most common cause of peanut allergy is eating peanuts or peanut-containing foods. Sometimes direct skin contact with peanuts can trigger an allergic reaction. Cross-contact. This is the unintended introduction of peanuts into a product. It's generally the result of a food being exposed to peanuts during processing or handling. Inhalation.
If you are allergic to almonds, you can have a reaction to any food that contains almonds, such as almond milk or amaretto liqueur. Photo Credit jeehyun/iStock/Getty Images. An almond allergy, like all food allergies, is caused by an immune reaction against a protein found in the food. Although almonds seem to cause the least allergy problems of all tree nuts, you can develop an allergy against the proteins found in the nut.