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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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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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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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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Myasthenia gravis

Myasthenia gravis is an autoimmune disease of the neuromuscular system that causes muscle weakness. Learn about symptoms, diagnosis and treatment.

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Anaphylaxis

Anaphylaxis is a severe allergic reaction and can be fatal. Explore triggers, symptoms, treatment and what to do in an emergency.

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Perfume stinks: how fragrances can affect your health

Fragrances and fragranced products cause health problems, such as asthma and headaches, in 1 in 3 people. Find out what you can do if you experience symptoms.

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Raynaud's phenomenon

Read about Raynaud's phenomenon, where parts of your body (often the fingers) change colour and feel numb and cool when you get cold or stressed.

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Guillain-Barre syndrome

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

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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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Insect stings - infographic

Explore this infographic to learn about the insects that can cause infections and allergic reactions, the symptoms and treatments you should be aware of and tips to prevent stings.

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Insect bites - infographic

Explore this infographic to learn about the insects that can cause infections and allergic reactions, the symptoms and treatments you should be aware of and tips to prevent bites.

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What's the difference between food allergy and intolerance — and other health concepts?

Wonder why psychiatrists and psychologists are different? Did you know that prebiotics and probiotics are not the same? Learn the differences between those things, and more.

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Dust mites

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

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Autoimmune diseases — an overview

Autoimmune diseases occur when your immune system attacks your own body. Learn more about the diagnosis and treatment of these diseases.

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Adrenaline

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

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Allergen immunotherapy

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

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Lupus

Lupus is a disease where your immune system attacks your own normal cells. Its cause is not yet entirely understood, but treatments are available.

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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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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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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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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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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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Hives (urticaria)

Hives is a skin rash that may be triggered by an infection or allergy. Learn more about hives rash (urticaria) it’s causes, symptoms and treatment.

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Thunderstorm asthma

Thunderstorm asthma happens when there are thunderstorms and a high pollen count. Learn more about its symptoms and treatment options.

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Nut allergies

Allergies to tree nuts and peanuts are a common cause of severe allergic reactions. Find out more here about managing nut allergies.

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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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Multiple sclerosis (MS)

Multiple sclerosis (MS) is a chronic disease affecting the central nervous system. Learn about the types of MS and how the symptoms can be managed.

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Allergy testing

Allergies can make conditions such as asthma and hayfever worse. Find out more here about different types of allergy tests and when they are useful.

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