Food Allergies

What is a food allergy?

A food allergy occurs when your immune system mistakenly identifies a specific food as harmful and reacts to it.

Even a very small amount of that food can trigger symptoms, sometimes within minutes.

This reaction can affect multiple parts of the body, including the skin, digestive system, and breathing.

What are the most common food allergies?

While many foods can cause reactions, most food allergies are linked to a small group of common triggers:

• Milk
• Eggs
• Peanuts
• Tree nuts (like almonds, walnuts)
• Soy
• Wheat
• Fish
• Shellfish

These account for the majority of food allergy reactions in both children and adults.

What are the symptoms of a food allergy?

Symptoms can range from mild to severe and usually happen shortly after eating the food.

Mild to moderate symptoms:

• Hives or skin rash
• Itching or tingling in the mouth
• Swelling of the lips, face, or tongue
• Nausea, vomiting, or diarrhea
• Nasal congestion

Severe symptoms (anaphylaxis):

• Trouble breathing or wheezing
• Throat tightening
• Dizziness or fainting
• Rapid drop in blood pressure

Severe reactions can be life-threatening and require immediate medical attention.

How quickly do food allergy symptoms occur?

Most reactions happen within minutes to two hours after eating the food.

In rare cases, symptoms may be delayed—but this is less common.

What causes a food allergy?

Food allergies are caused by an overactive immune response.

When you eat a trigger food, your body produces antibodies (IgE) and releases chemicals like histamine, which lead to symptoms. This is different from food intolerance, which does not involve the immune system.

What’s the difference between a food allergy and food intolerance?

This is one of the most common questions patients ask.

• Food allergy:
• Involves the immune system
• Can be severe or life-threatening
• Triggered by even small amounts
• Can cause symptoms like bloating and discomfort
• Food intolerance:
• Affects digestion (not the immune system)
• Causes symptoms like bloating or discomfort
• Often depends on how much you eat

Understanding the difference is important for proper treatment and safety.

How are food allergies diagnosed?

Diagnosis typically includes:

• A detailed review of your symptoms and food history
• Skin prick testing or blood tests
• Sometimes a supervised food challenge

Your provider will work to identify the exact trigger so you can safely manage your condition.

What are the treatment options?

The primary treatment for food allergies is avoiding the trigger food. Additional management may include:

• Antihistamines for mild reactions
• Prescription medications if needed
• Carrying an epinephrine auto-injector for severe allergies

Newer therapies, such as oral immunotherapy, may be an option for certain patients.

When should I see an ENT or allergy specialist?

You should seek evaluation if:

• You suspect a food is causing repeated symptoms
• You’ve had any allergic reaction after eating
• You experience swelling, breathing issues, or severe symptoms
• You’re unsure if it’s an allergy or intolerance

A specialist can help confirm the diagnosis and create a clear plan to keep you safe.

Are food allergies common in children vs. adults?

Food allergies are more common in children, especially allergies to milk, eggs, and peanuts.

Some children outgrow certain allergies, but others—like peanut or shellfish allergies—can last into adulthood.

Can food allergies affect daily life?

Yes, and often more than expected. Food allergies can impact:

• Dining out
• School or work environments
• Travel
• Social events

With proper education and planning, most patients can safely manage their condition and live normally.

Is there a cure for food allergies?

There is currently no cure, but food allergies can be effectively managed.

Avoidance, awareness, and having an emergency plan are key to staying safe and confident in daily life.

Ready to Get Answers in Newport News or Hampton Roads?

If you’re experiencing symptoms after eating certain foods—or simply aren’t sure what’s causing your reactions—our team can help.

Schedule an evaluation today to identify triggers and create a personalized plan to keep you safe and feeling your best.

References

• Mayo Clinic. Food Allergy: Symptoms & Causes
• Mayo Clinic. Food Allergy vs Food Intolerance
• Mayo Clinic Proceedings. Food Allergy Overview
• Mayo Clinic. Diagnosis & Treatment of Food Allergy