What happens to my body?

Learn how your body reacts to allergens and how allergic reaction symptoms like sneezing and anaphylaxis are triggered by mast cells in your immune system. Discover their role in producing histamine and how treatments with antihistamine counter this effect.

Allergies – it’s war

Like all armed forces, your immune system makes mistakes. In real life it's called friendly fire. In your body it’s called an allergic reaction. Learn more about this mechanism.


Asthma is a long-term (chronic) disease of the respiratory system.

Hay fever

The term hay fever is a misnomer: the condition is not caused by hay, nor does it produce fever. The clinical name is seasonal allergic rhinitis, which is a type of allergy.

Anatomy of a sneeze

Sneezing, also called sternutation, is your body's way of getting something irritating out of your nose. Here's how it works.

How mast cells work

Your body is a weapon. The immune system is a machine of war, ready to take on invaders. The immune system has its own internal affairs department: it can identify cells which are

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Ask the Expert

Allergy expert

Dr Morris is the Principal Allergist at the Cape Town and Johannesburg Allergy Clinics with postgraduate diplomas in Allergology, Dermatology, Paediatrics and Family Medicine dealing with both adult and childhood allergies.

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