What Is a Food Allergy?
A food allergy is a medical condition where the body's immune system over-reacts to a harmless protein found in a certain food. The most common food allergies in the United States include reactions to peanuts, eggs, milk, wheat, and fish.
Food allergies are not the same as food intolerances. A milk allergy, for example, is an immune response, whereas lactose intolerance is a digestive issue involving insufficient lactase enzyme production. Both require careful dietary management, but the mechanisms and risks differ significantly.
Symptoms
Symptoms typically appear shortly after consuming the triggering food and may include:
- Skin reactions — hives, rashes, eczema, flushing, or swelling of the lips, tongue, and throat
- Digestive reactions — belly pain, diarrhea, nausea, vomiting, or bloating
- Respiratory reactions — runny nose, wheezing, or difficulty breathing
- Cardiovascular reactions — rapid heartbeat or low blood pressure (in severe cases)
When to See a Doctor
See a doctor if you suspect a food allergy. Because reactions can be unpredictable and potentially life-threatening, early diagnosis and an allergy action plan are essential.
Causes
The exact cause of food allergies is not fully understood. There may be a genetic component, and people with other allergic conditions such as asthma or eczema may be more likely to develop food allergies.
Diagnosis & Tests
Dr. Zoeteman may refer you to an allergist for:
- Allergy skin testing — small scratch tests on the forearm or back with common allergens
- Blood tests to check for IgE antibodies to specific foods
- Supervised elimination diets to confirm triggers
Treatment Options
Currently there is no cure for food allergies. Management involves:
- Strict avoidance of the triggering food
- Careful label reading and restaurant communication
- Carrying prescribed emergency medications, including an epinephrine auto-injector (EpiPen)
- Maintaining an individualized allergy action plan
Prevention
While there is no known way to prevent a food allergy, working closely with your doctor to identify all triggers and maintain a comprehensive safety plan significantly reduces the risk of accidental reactions.