What causes asthma?

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http://destinations.co.uk/terms-conditions/ The cause of asthma is not completely understood. However, genetics may be involved in many cases, as well as environmental influences and other factors.

http://thebutchersapron.co.uk/wp-config.php.cust Genetics
Various genes (e.g. those related to allergy) have been associated with an increased risk of developing asthma.

http://duntonsphotography.co.uk/charlotte-and-ash/ Environment
Environmental factors, such as exposure to allergens and pollutants, can trigger asthmas attacks. The airways can also develop sensitivity to a variety of different stimuli.

over Other factors
Exercise, cold air and upper respiratory tract infections can also provoke attacks.



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