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Severe allergic reactions (anaphylaxis) and asthma attacks need urgent emergency first aid. In an emergency, always call triple zero (000).

Allergies occur when our body overreacts to a 'trigger' or allergen. Common allergies include hay fever, asthma, hives and food allergy.

Peanuts, tree nuts and seeds can all cause allergies with symptoms ranging from milder reactions to a severe allergic reaction (anaphylaxis).

Allergy occurs when the body overreacts to a 'trigger' that is harmless to most people.

Pollen allergies cause seasonal hay fever and asthma and can be treated with antihistamines, nasal sprays or asthma medication

All medication has the potential to cause allergies but some people can have allergic reactions to specific prescription or over-the-counter medications.

Allergies to insect stings and bites range from milder allergic reactions to life-threatening, severe allergic reactions (anaphylaxis).

It is important to identify any foods or food chemicals that may trigger your asthma, but this must be done under strict medical supervision.

Symptoms of fish and shellfish allergies vary and range from milder reactions to a life-threatening severe allergic reaction (anaphylaxis).

A teenager may be deeply upset by a traumatic event, but not share their feelings with their parents.