No, pineapple is not a common allergen. However, allergies to pineapple exist and are more common in people with a latex allergy. People with oral allergy syndrome may react to pineapple, which is typically a local reaction to the mouth. Pineapple also contains an enzyme called bromelain, which could cause skin or mouth irritation, but it is not life-threatening. Cooking pineapple can reduce or eliminate oral allergy syndrome reactions and reactions to bromelain.