Immune system

Your body's immune system is designed to protect you from, or get rid of, infection. Learn more about how the immune system works.

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Autoimmune conditions

Autoimmune diseases strike when the immune system attacks healthy cells in the body. Read about the causes, symptoms and treatment options.

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Allergies

Information about allergy types, as well as allergy testing, anaphylaxis, antihistamines and common related conditions such as asthma and hay fever.

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A guide to hay fever

Hay fever, or allergic rhinitis, can be triggered by dust, grass and pollen. Learn about antihistamine medicines and other ways to manage symptoms, plus find out when an allergy test might be a good idea.

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Connective tissue diseases

Connective tissue diseases can affect many different areas of the body and the immune system, caused by single gene mutations or inflammation. Learn more here.

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Insect bites - infographic

What you need to know about insect bites, including symptoms, treatment and signs of a severe allergic reaction.

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Insect stings - infographic

What you need to know about insect stings, including symptoms, treatment and signs of a severe allergic reaction.

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Antiphospholipid syndrome (APS)

Antiphospholipid syndrome (APS) is a blood disorder that increases the risk of blood clots and pregnancy complications. Learn more here.

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Raynaud's phenomenon

Raynaud's disease causes skin colour changes, numbness and pain triggered by cold or stress. Learn about its causes and treatment options.

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Allergic reactions to cow's milk

Allergic reactions to cow’s milk are very common. It is seen in about 1 in 50 infants. Learn more here about allergy to milk proteins.

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Autoimmune diseases — an overview

Autoimmune diseases occur when your immune system attacks your own body. Learn about the symptoms, diagnosis and treatment of autoimmune diseases.

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Pollen allergy

If you have pollen allergy, you may experience hay fever and asthma symptoms. Get tips on how to help manage your exposure to pollen.

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Vasculitis

Vasculitis is a group of conditions caused by inflammation of your blood vessels. Read more about types of vasculitis, symptoms and treatment options.

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Adrenaline

Adrenaline (epinephrine) is a natural stress hormone. It is also a medicine used in emergencies for severe allergic reactions (anaphylaxis).

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Allergen immunotherapy

Allergen immunotherapy involves taking gradually increasing doses of allergens over time to treat allergies. Read on to learn more.

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Allergy testing

Allergy testing is used to find the allergens that cause allergy or asthma symptoms. Find out more here about different types of allergy tests.

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How to use an adrenaline autoinjector

An adrenaline autoinjector can, in an emergency, save the life of someone who is having a severe allergic reaction (anaphylaxis). Learn how to use one here.

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Cat and dog allergy

Allergies to pets are common, particularly cats and dogs. Symptoms can range from mild to severe. Learn more about how to live with a pet allergy.

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Guillain-Barre syndrome

Guillain-Barre syndrome is an autoimmune disease causing weakness, numbness or paralysis. Learn about its symptoms, diagnosis and treatment options.

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Allergies to seafood

Seafood allergy is complex, and most people don’t grow out of it. Find out more about the symptoms and diagnosis of seafood and fish allergy.

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Food allergies

Some people are allergic to different types of food such as milk, eggs and wheat. Read here to find out more about living with food allergies.

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Antihistamines

Antihistamine medicines help reduce allergy symptoms. You can learn more about how they can treat or prevent conditions like hay fever and asthma.

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Allergies and hypersensitivities

An allergic reaction occurs when the immune system overreacts to a substance. Find out about common allergies, their symptoms and treatments.

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Anaphylaxis

Anaphylaxis is a severe allergic reaction needing urgent care. Learn about triggers, symptoms, treatment and what to do in an emergency.

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Itchy eyes

Itchy eyes are often caused by an allergy or dry eye syndrome. Read more about what causes itchy eyes and what you can do to treat and prevent them.

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Egg allergy

Egg allergy usually starts in infancy, but most children grow out of it. Learn about the symptoms and diagnosis of egg allergy, and ways to avoid egg.

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Hives (urticaria)

Hives (urticaria) are raised, itchy and pink swellings on the skin, often caused by allergies. Learn more about causes and treatments.

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Peanut allergy

Peanut allergy is common and can be life-threatening. Find out how to reduce the chance of having a severe allergic reaction to peanuts.

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Grass allergy

Grass allergy causes someone to have an allergic reaction to grass pollen spread by the wind. Learn more about its symptoms, diagnosis and treatment.

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Dust mites

Dust mites are tiny creatures that live in your house and feed on dust. Learn more about what you can do if they trigger allergy symptoms.

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