What is Asthma? | The Causes of Asthma | Asthma Symptoms

Diagnosis of Asthma | Treatment | Asthma Prevention |

Occupational Asthma | Asthma in Children


The Causes of Asthma

The causes or inducers of asthma is very different to what may trigger asthma.

Causes or Inducers

Inducers causes both of the airway to be inflamed and the airway hyper-responsive and hence, asthma. The symptoms that cause induces often last longer.

A common form of inducers is allergens. Inhalant allergens are the most important inducer that causes asthma. The common inhaled allergens are:

  • Pollen – from grass, tress and weeds
  • Animal – common household pets such as cats and dogs furs
  • Molds
  • Household dust and mites

Exposure to any abovementioned allergen may cause immediate asthma symptoms to occur. This is because the airway are hyper-responsive and react by tightening the airway. After a 7-8 hours to the exposure inflammation will develop. Because inflammation occurs so slowly it is often impossible for the physician to identify the asthma attack.


Triggers is when the airway become irritated and tightening and as a result causes bronchoconstriction. Triggers do not cause inflammation. The symptoms and bronchoconstriction caused by triggers then are immediate and short lived. If inflammation is already present the airway will react more quickly to triggers.

The common triggers of bronchoconstriction include everyday stimuli such as:

  • Smoke – from cigarette or factory
  • Strong Fumes – from cars, truck or factory
  • Dust
  • Cold Air
  • Exercise
  • Inhaled irritants
  • Aspirin and other medications
  • Chemicals in the air or in food
  • Ciral infections, such as the common cold
  • Emotional upsets

Smoke is a very strong trigger that provokes asthma. Research has shown that secondhand smoke has aggravated asthma symptoms, especially among children. It is therefore very important to provide a smoke fee environment around our house, parks, family restaurants and shopping centre for all of our children to reduce asthma.

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