Mild, Moderate or Severe? Recognising the Signs of an Allergic Reaction in a Young Child -

Knowing the difference between a mild reaction and a medical emergency can feel overwhelming, especially when your child is too young to tell you how they’re feeling. Here’s a breakdown based on the ASCIA Action Plan and years of clinical experience recognising these symptoms.

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If you prefer to listen, you can start here:

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You can also keep reading below for a clear written breakdown

Understanding the ASCIA Action Plan

There are two versions of the ASCIA Action Plan. The red plan is given to children who have an EpiPen and are considered at higher risk of a severe allergic reaction. The green plan is for children who don’t yet have an EpiPen, often because a doctor hasn’t assessed them as high-risk enough to need one. Both plans outline the same categories: mild, moderate and severe symptoms. The 2026 version now includes pictures alongside the text, making it easier to reference quickly.

Mild to moderate symptoms

Tingling in the mouth
Swelling of the lips, face, and around the eyes or ears — swelling around the ears in particular can look dramatic (“fortune cookie ears”), since there’s little tissue there to absorb the extra fluid
Hives — these can look different depending on skin tone, but typically appear as white lumps with a red flare around them, similar in appearance to a mosquito bite (both are a histamine response)
Itchy throat
Abdominal pain and vomiting

Important distinction: abdominal pain and vomiting from a food allergy is generally a mild to moderate symptom. But if the reaction is from an insect bite or sting, the same symptoms are classified as severe, meaning adrenaline should be given if the child has an EpiPen.

Severe symptoms (anaphylaxis)

Swelling or tightness in the throat — in very young children who can’t describe this, they may grab at their throat instead
A hoarse voice, or a different sound when crying or speaking
Swelling of the tongue — despite how often this appears in films, it’s actually one of the rarest symptoms clinically, seen only a handful of times across a decade of practice
A wheeze or persistent cough — this is the most common symptom seen in practice. The cough isn’t a big, dramatic hacking cough, it’s a cough that simply won’t stop. A wheeze often follows the persistent cough, though this pattern isn’t universal
Dizziness or collapse — older children may be able to tell you they feel dizzy; very young children who can’t communicate this may instead become very pale and floppy, which is what a drop in blood pressure looks like in a baby

The pattern isn’t always the same

While a persistent cough followed by a wheeze is the most commonly observed progression, it isn’t the only one. Sometimes symptoms begin with hives and sneezing first. Occasionally, severe symptoms appear before any skin reaction at all. Every reaction can look a little different.

The key takeaway

Remember: abdominal pain and vomiting mean something different depending on the trigger, mild to moderate for food, but severe for a bite or sting. Knowing this distinction, along with the difference between how anaphylaxis presents in a baby versus an older child, can help you respond quickly and appropriately.

Looking for more practical support?

If you’re looking for simple, evidence-based resources to help you navigate food allergies, introducing allergenic foods, egg ladders, choking first aid, I’ve created a growing collection of practical guides & allergy toolkits for busy parents.

Every resource has been designed to save you time, reduce the mental load and help you feel more confident caring for your child.

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