Peanuts in particular are also tricky because, unlike with milk and eggs, children don't often outgrow their peanut allergies.

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If you do not know whether your child has atopy, check your family's medical history, since such allergies are often genetic.

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It is my belief that nut allergy and most food allergies are often a result of the body becoming sensitised to them through the skin.

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Allergies and oral infections often can be treated medically.

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You should change this filter every 3 to 6 months -- more often if you have pets or live with a smoker, or if you or a loved one has allergies.

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Another 18% were admitted for food allergies, with the remaining 17% admitted for angio-oedema - deep swelling underneath the skin, often around the eyes and lips, and sometimes on hands and feet.

BBC: NEWS | Health | Severe allergies 'rising sharply'