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Allergies health centre

Allergy overview

It’s estimated that around 21 million adults in the UK and half of all children and teenagers have an allergy. Common causes of allergy symptoms include food allergies, such as peanut allergy, and seasonal allergies resulting from grass, weed, tree pollen or various moulds. Pet allergies can also cause miserable symptoms such as itchy eyes, sneezing, nasal congestion and wheezing, while allergic skin conditions can cause a rash and itchy skin.

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Feeding baby egg and peanut 'may prevent allergy'

Feeding babies quantities of egg and peanut may reduce the risk of them developing allergies to these foods, a review of the evidence suggests.

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Allergy basics

What are allergies?

Having an allergy means having a bad reaction to something in the air or something you eat or come into contact with.



These triggers are called allergens, and include pollen, mould and dust in the air, as well as foods such as nuts.



Allergies are common, according to Allergy UK, one in four people in the UK suffers from an allergy at some point in their lives.

No one knows why some people develop allergies, but they may be inherited. Allergies may flare up and subside throughout your life.

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