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

hives (urticaria) are a reaction to the release of histamine into the skin.

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

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

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

egg allergy is one of the most common causes of allergies in children with symptoms ranging from mild to life-threatening reactions.

the best way to manage latex allergy is to avoid exposure to latex products.

milk allergy symptoms range from mild to a life-threatening severe allergic reaction. avoid food containing milk only under strict medical supervision.

food allergy is an immune response, while food intolerance is a chemical reaction.

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