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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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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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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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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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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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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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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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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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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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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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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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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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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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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Rashes

Rashes can be red, pink, purple, flat or bumpy, itchy, scaley or pus filled. Read on to learn about the causes and management of various rashes.

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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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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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Vasculitis

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

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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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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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Stinging plants

Stinging trees and nettles can hurt. Find out what these plants look like, how to avoid getting stung and what to do when the worst happens.

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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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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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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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Antihistamines

Antihistamine medications help ease allergy symptoms. Read more about how they're used to treat conditions like hay fever and asthma.

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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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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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