Food allergies cause severe allergic reactions that can be life-threatening (anaphylaxis), such as breathing difficulties and swelling of the face. These reactions involve the immune system reacting to the food and the body releasing irritating chemicals into the tissue to fight the food protein.
Food intolerance does not involve the immune system. Some substance within the food cause symptoms such as stomach pain, nausea, bloating or headaches after eating. Food intolerance can be very uncomfortable and even painful, but not life-threatening.
Please consult your doctor if you have any questions or concerns.
Visit the Australasian Society of Clinical Immunology & Allergy (ASCIA) for more information.