These organs work together to allow you to breathe in and out. Scientists call it the respiratory system.
Allergies can make your airways narrower, or even block them up completely.
Anything that sets off an allergic reaction is called an allergen.
If you get hay fever in the summer, you are probably allergic to grass pollen. It’s just one of hundreds of known allergens.
You’ll be pleased to know this guy’s only a third of a millimetre long in real life.
You’ll be less pleased to know that they’re all over your house, munching up the tiny flakes of skin that constantly drop off you and your family.
Asthma sufferers use inhalers to help manage their asthma. A small disposable canister puffs out a measured dose of medicine as a fine vapour when you squeeze the inhaler. Breathing in the vapour gets the medication into the airways.
You have an allergic reaction when your body’s own defence system attacks the wrong thing.
It doesn’t have to be something you breathe in. The allergen could be in something you eat or drink, or even just touch.