The air we breathe is full of microscopic particles of dust, pollens, water and pollution from factories and motor vehicles. The amount and type of particles varies between different places (houses, offices, schools, workplaces, countryside and cities) and at different seasons of the year.
House Dust mites Cigarette smoke Pollen Pets e.g. cats Weather Change
There is also other matter in the air that although not an allergy can make your asthma symptoms worse by irritating the airways (irritants). This includes tobacco smoke, wood fire smoke, perfumes, paint, chemicals and gases (e.g. unflued gas heating). Inhaled allergens and irritants are referred to as triggers and cause the airways of the person with asthma to narrow and become inflamed making it harder to breathe. Some people have sneezing, blocked nose, itchy eyes and throat (hay-fever, sinusitis, and rhinitis) or develop skin rashes (eczema or urticaria).
Take note of when and where you are when your asthma symptoms become worse and how severe they are:
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