The diagnosis of a serious food allergy is one of those parental moments where the world reorganises itself in an afternoon. Suddenly every label matters, every birthday party needs a phone call, and every new caregiver needs a briefing. The first few months are genuinely hard. They get easier. The families who do well are usually the ones with a clear written plan, a small set of well-rehearsed routines, and a realistic understanding of what is and isn't an emergency.
Healthbooq covers food allergy and intolerance in infants and young children.
Get the Diagnosis Right First
Before settling into management, it's worth being sure exactly what type of allergy you're dealing with. The two are managed differently.
IgE-mediated allergy. Reactions within minutes to 2 hours. Hives, swelling, vomiting, and at the severe end, anaphylaxis. Diagnosed via skin prick or specific IgE blood test plus clinical history. Adrenaline autoinjectors are part of management if reactions have been or might be severe.
Non-IgE-mediated allergy. Delayed reactions, hours after the food. Mostly gut symptoms (vomiting, diarrhoea, mucus or blood-streaked stools, poor weight gain) or eczema flares. Anaphylaxis does not occur with this type. Diagnosed clinically — usually by an elimination diet then a structured reintroduction. SPT and blood tests aren't useful for this type.
Mixed presentations exist (eczema with food triggers, eosinophilic oesophagitis, FPIES — the food protein-induced enterocolitis syndrome — which can produce dramatic delayed vomiting). These need specialist input.
If you're managing on the basis of an undiagnosed reaction, ask the GP for an allergy referral. Long-term avoidance based on guesswork carries its own costs.
The Action Plan Is the Foundation
The single most important document in food allergy management is the written allergy action plan — the BSACI plans (paediatric AAI, paediatric non-AAI) are the standard in the UK. It should:
- Name the allergen(s)
- Show photos of typical mild and severe reactions
- Specify exactly what to give for which symptoms
- Specify the doses by weight
- Include emergency numbers and the GP/specialist details
Print copies for: the changing bag, the nursery, the kitchen fridge, every grandparent, the swimming bag, the holiday luggage. Update it after every allergy review.
Adrenaline Autoinjectors: The Bits That Matter
If your child has been prescribed adrenaline autoinjectors (Jext, EpiPen, Emerade in the UK):
Carry two. UK and international guidance (BSACI, Resuscitation Council) recommend two autoinjectors at all times — about 10 to 20% of severe reactions need a second dose if the first hasn't worked or is fading. One pen is not enough.
Where to give it. Mid outer thigh — through clothing if needed. Hold for 10 seconds (Jext, EpiPen) or as per the device. Massage the site for 10 seconds after.
When to give it. Any of: difficulty breathing, throat tightness, persistent cough, voice changes, swallowing problems, hives plus vomiting, sudden severe abdominal pain plus skin signs, pale and floppy, drowsy. If in doubt, give it. Adrenaline at this dose is very safe; an under-treated anaphylaxis is not.
Lay them flat. This is the part most often missed. Standing up after adrenaline can trigger a fatal "empty heart" event — blood pools in the legs, the heart can't refill. Keep the child lying flat (or sitting if breathing is much easier that way) until paramedics arrive. Do not stand them up to walk to the ambulance.
Then call 999. State "anaphylaxis" — that bumps the priority. Tell them adrenaline has been given. Stay on the line.
Always go to hospital after adrenaline. Even if symptoms resolve. Around 5% of children have a biphasic reaction — the symptoms come back hours later. Observation for at least 4 to 6 hours after a moderate-to-severe reaction is standard.
Replace expired pens promptly. Set a calendar reminder for the expiry. Most autoinjectors last 18 months from dispensing.
Reading Labels: The Daily Habit
UK and EU food law requires the 14 major allergens to be declared and emphasised (usually bold) on pre-packaged food. The 14: celery, cereals containing gluten (wheat, rye, barley, oats), crustaceans, eggs, fish, lupin, milk, molluscs, mustard, peanuts, sesame, soybeans, sulphites, and tree nuts.
A few practical realities:
Recipes change. A product that was safe last month may have been reformulated. Read labels every time, even on familiar products. Set this as a habit early; it becomes automatic.
"May contain" / "may include traces of" statements are voluntary, not legally required. Their absence doesn't guarantee freedom from cross-contamination. Their presence isn't proof of contamination either — manufacturers vary in how cautious they are.
For most IgE-mediated allergies your allergy team will give you specific advice on "may contain" statements. Generally:
- Mild allergy with reliable thresholds: "may contain" products often acceptable
- History of severe reactions or unknown threshold: avoid
Ask the team to be explicit about which approach is right for your child.
For non-pre-packaged food (deli counters, bakery, cafes, restaurants): the law requires staff to provide allergen information when asked. Many places now have allergen matrices at the till.
Eating Out
A few habits that smooth the experience:
- Phone ahead for new restaurants. Talk to the manager, not just whoever picks up
- Carry chef cards — small printed cards stating the allergy and what cross-contamination matters (a free template is on the Anaphylaxis UK website)
- Ask about preparation, not just ingredients. Shared fryers, shared utensils, shared chopping boards — all can transmit allergen even if the listed ingredients are safe
- Avoid buffets with severe allergies — cross-contamination via shared serving spoons is hard to control
- For peanut and nut allergy, avoid Asian, Indian, and African cuisines at restaurants you don't know — the cross-contamination risk in these kitchens is genuinely higher
- Don't eat anything you can't verify. Better to eat the safe snack from your bag than risk it
When in doubt, walk away. The cost of a missed meal is much lower than the cost of a reaction.
Nursery, Childminder, and School
Settings have a legal duty under the Equality Act and the Children and Families Act to support children with medical conditions, including food allergy. Practical preparation:
- Letter from GP or allergy specialist confirming the diagnosis and what's needed
- Healthcare plan / IHCP — many settings have a template. It includes allergens, action plan, medication storage, named trained staff
- Two prescribed autoinjectors stored at the setting (clearly labelled, in date)
- Photos of the child attached to the action plan in the staff areas
- Training for all staff who interact with the child, not just the manager
- A clear food policy — does the setting cook for everyone, or do you provide your child's food?
- Birthdays and parties — agree in advance how these are handled. Many parents send a "treat box" with safe alternatives for impromptu cake moments
Some schools have moved toward "no nuts" environments. Others are uncomfortable doing so. The position you take depends on the severity of the allergy and the nature of the setting; both approaches can work with the right plan.
Cross-Reactivity and Surprises
A few cross-reactivity patterns to know about:
- Cow's milk allergic children are often (but not always) sheep's and goat's milk allergic too — proteins are similar. Soy formula is tolerated by some CMPA infants but not all
- Peanut is a legume, not a tree nut — children allergic to peanut often tolerate tree nuts and vice versa, but not always
- Tree nut allergic children — cross-reactivity within tree nuts varies; cashew/pistachio cross-react closely, walnut/pecan cross-react closely
- Egg allergic children may tolerate baked egg (cake, biscuits where the egg is heated thoroughly) — this is a clinic-supervised question, not a home one
- Pollen-food syndrome — older children with hay fever may get mouth itching with raw apple, cherry, plum, kiwi, etc. — usually mild and not the same as a true food allergy
The Milk and Egg Ladder
Most cow's milk and egg allergies are outgrown — around 80% of milk by age 5, around 70% of egg.
Telling whether your child has outgrown is done through a structured ladder under your allergy team's guidance, where small amounts of well-baked egg or milk-containing products are introduced first (the proteins are altered by cooking and are less allergenic), progressing to less-cooked forms.
The iMAP (international Milk Allergy in Primary care) ladder for cow's milk allergy and the BSACI egg ladder are the UK standards. Don't run these without specialist guidance — moving too fast through them is the main reason families have setbacks.
The other reason to do this actively: continuing to avoid a food a child has actually outgrown is nutritionally and socially costly, and there's some evidence that ongoing avoidance of foods they could tolerate may slow the development of full tolerance.
Oral Immunotherapy
For peanut allergy, Palforzia is now licensed and available through some NHS specialist allergy services for children aged 4 to 17. It's a slow up-dosing protocol over months that raises the threshold at which a child reacts — meaning a small accidental exposure is less likely to trigger a serious reaction. It is desensitisation, not cure. Stopping the daily dose can lead to loss of protection.
Eligibility, access, and waiting times vary. Worth asking your allergy specialist if it's an option.
Daily Life: What Actually Helps
A few habits that families with allergic children have found make life feel less restrictive:
- A "safe snack" stash at home, in the car, in the changing bag, at the grandparents' — pre-vetted snacks the child can always have
- A simple house rule for new foods — only the parent gives the child new things to try. Older siblings, well-meaning grandparents, and school friends do not
- Teach your child early — a 3-year-old can learn "I have an allergy. I only eat food Mum gave me." Children manage their own allergy younger than adults expect
- Rehearse with the autoinjector trainer every few months — it should feel familiar, not alarming
- Don't make the allergy the child's identity. They have an allergy; they are not "the allergic kid." Tone matters. Anxiety transmits
When the Anxiety Is Bigger Than the Risk
Allergy anxiety is real. After a serious reaction, families often go through a period of hyper-vigilance that is functional in the short term but exhausting over time. Worth knowing:
- Most children with food allergy never have a fatal reaction. Fatal anaphylaxis is rare — UK incidence is around 0.03 per 100,000 per year in food-allergic individuals. Nearly all fatalities involve known allergy + delayed adrenaline + standing up
- The two best predictors of safety are fast adrenaline use and lying flat
- Children with allergies grow up to be adults with allergies who function well
Anaphylaxis UK and the BSACI both run good support resources. If allergy anxiety is significantly affecting daily life or your child's psychological development, ask the GP about psychology support — this is recognised and routine.
Quick Reference: Symptoms
Mild to moderate (usually not anaphylaxis):- Hives anywhere
- Swelling of lips, eyes, face
- Itchy mouth or scratchy throat
- A few hives + nausea or single vomit
- Mild abdominal pain
→ Antihistamine, monitor closely, GP/111 same day
Anaphylaxis (any of these):- Difficulty breathing or persistent cough
- Wheeze or noisy breathing
- Throat tightness, hoarseness, swallowing difficulty
- Sudden persistent vomiting (especially with skin signs)
- Pale, floppy, drowsy, or unresponsive
- Collapse
→ Adrenaline autoinjector NOW. Lay flat. 999. Second pen at 5–10 minutes if no improvement.
Key Takeaways
Living with a child's food allergy is a steep first few months and a manageable everyday after that. The non-negotiables: a written, in-date BSACI allergy action plan from your allergy team; two adrenaline autoinjectors carried at all times if prescribed; nursery and grandparents trained on what to do; and a habit of reading every label, every time, even on familiar products (recipes change). Cow's milk and egg allergy are commonly outgrown — most children grow out of them by age 5 — so periodic supervised review with the milk or egg ladder is essential rather than assuming the allergy is permanent. Peanut and tree nut allergies are usually persistent, but oral immunotherapy (Palforzia) is now an option for some children. Anaphylaxis: adrenaline first, lay them flat, then 999.
