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Allergies, blood and immune system – articles and advice

Features and advice on living with allergies, blood conditions and immune system problems. For trusted reference, see our Patient Information Leaflets on allergies and immune health.

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A close-up of a person's elbow showing a red, inflamed mosquito bite (skeeter syndrome) against a blue background.

Allergies, blood and immune system

What is Skeeter syndrome? When a mosquito bite is more than just an itch

by Heather Ainsworth

Empty test tubes on yellow background, flat lay.

Tests and investigations

How to prepare for a blood test

by Lynn Stephen

a cute newborn in a yellow-green hat in the form of a sunflower flower sleeps peacefully. beige background with space for text with a baby sleeping in a wicker basket decorated with sunflower flowers.

Allergies, blood and immune system

How to protect your baby against allergies

by Lawrence Higgins

Bowl of peanut butter and peanuts on table background. top view with copy space. Creamy peanut pasta in small bowl.

Allergies, blood and immune system

How to introduce your baby to allergenic foods

by Lawrence Higgins

Allergies

Find out about allergies, including typical symptoms, common allergies, when to get emergency medical help and allergy testing and treatments.

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Food allergy and intolerance

A food allergy is a harmful immune system response, causing symptoms like swelling, wheezing, or rash to appear quickly, while an intolerance is a digestive issue that does not involve the immune system and typically causes slower-developing symptoms like bloating, gas, or stomach pain.

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Hay fever

Hay fever, or allergic rhinitis, is a common allergy caused by pollen that results in symptoms like sneezing, a runny or blocked nose, and itchy, watery eyes.

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Blood and blood disorders

Your blood keeps every part of your body alive and well. Discover how it works, what common disorders exist, and when to get things checked.

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Blood tests

Blood tests are laboratory analyses of blood samples used to check general health, diagnose medical conditions, monitor ongoing diseases, and evaluate how well organs are functioning.

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The immune system

Your immune system is your body’s personal bodyguard. Learn how it protects you, what weakens it, and what to do when it’s not working properly.

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