Egg Allergy

Egg Allergy Guide: Symptoms, Causes, Diagnosis and Treatments

Overview

Egg allergy often shows up early in life, sometimes before a child’s first birthday. Many children grow out of it as they get older, though for some it can persist into the teenage years and beyond. It’s less common to develop egg allergy as an adult, but it can happen.

Reactions can range from mild to severe. While many people only experience skin or tummy symptoms, a small number may be at risk of serious reactions.

Symptoms

Risk Factors

• Having asthma, especially if it is poorly controlled
• Reacting to very small amounts of egg
• A history of severe allergic reactions

Egg can also behave differently depending on how it’s cooked. Many children tolerate baked egg (in cakes or biscuits) but react to lightly cooked or raw egg (like scrambled, pancake, or mayonnaise). This can make diagnosis confusing, so keeping a food diary can help.

Living with Egg Allergy

• Shopping: 
  Check ingredient labels carefully. Look out for words like albumin, ovalbumin, ovomucoid, and “egg protein.”
• Eating out: 
  Always ask staff if food contains egg or may have been prepared with it. Always double-check if you are unsure.
• School & social life: 
  Share your child’s allergy plan with teachers, clubs, and friends’ parents so they know what to avoid.
• Vaccines: 
  Most people with egg allergy can safely have common vaccines such as MMR. The flu vaccine is generally safe too, though some types are grown in egg — your doctor or healthcare professional will advise.

Emergency Action

Mild allergic symptoms can often be treated with an antihistamine.

However, if there are signs of a severe allergic reaction — such as difficulty breathing, swelling of the throat or tongue, wheezing, sudden dizziness, or collapse — this is a medical emergency. Call your local emergency number immediately and use an adrenaline auto-injector if one has been prescribed.

Adrenaline auto-injectors commonly prescribed include:

• EpiPen® (adult and junior doses)
• Jext® (adult and junior doses)
• Auvi-Q® (available in some countries)

People at risk of severe allergic reactions are usually advised to carry two auto-injectors at all times, in case a second dose is needed.

After using an adrenaline auto-injector, medical attention is still required, as symptoms can return.

Friends, family members, teachers, and carers should know where the devices are kept and how to use them. Training devices and demonstration videos are available from the manufacturers’ websites.

Outgrowing Egg Allergy

Many children gradually outgrow their egg allergy, often in stages:

1. Tolerating baked egg in cakes or biscuits
2. Later managing lightly cooked egg (pancakes, scrambled)
3. Eventually tolerating raw egg (mayonnaise)

Your allergy specialist can advise when it’s safe to try introducing different forms. Sometimes regular baked egg in the diet can even speed up tolerance — but always check with a healthcare professional first.

Future Treatments

Research into new treatments for food allergies is ongoing. Some emerging approaches include:

Oral immunotherapy (OIT) – gradually introducing very small amounts of the allergen under medical supervision to help build tolerance.

Epicutaneous immunotherapy – skin patch treatments designed to slowly desensitise the immune system.

New medicines and biological therapies – researchers are studying treatments that may help reduce the severity of allergic reactions.

Many of these treatments are still being studied and may not be suitable for everyone.

For now, the safest approach remains avoiding trigger foods, checking ingredient labels carefully, and carrying emergency medication if prescribed.

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When to Seek Medical Advice

Speak to a doctor or healthcare professional if you think you or your child may have a food allergy. Symptoms such as hives, swelling, stomach pain, vomiting, or breathing problems after eating certain foods should always be assessed by a medical professional.

Urgent medical attention is needed if symptoms of a severe allergic reaction (anaphylaxis) occur, including difficulty breathing, swelling of the throat or tongue, wheezing, dizziness, or collapse.

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Resources

• NHS – Food Allergy Guidance
• Allergy UK
• British Society for Allergy & Clinical Immunology (BSACI)

These organisations provide trusted information, advice, and support for people living with allergies.

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Medical Disclaimer

This guide is provided for general information only and is not a substitute for professional medical advice, diagnosis, or treatment.

Always seek advice from your doctor, allergy specialist, or another qualified healthcare professional if you have concerns about allergies, symptoms, or treatment.

If you believe you or someone else may be experiencing a severe allergic reaction (anaphylaxis), seek emergency medical assistance immediately.

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Food Allergy Guides