What Triggers Asthma in the Home | Home Ventilation Systems


Asthma is a condition caused by an inflammation of the bronchi (the small tubes which carry air in and out of the lungs). When a person with asthma comes into contact with something that irritates their lungs (this is called an asthma trigger), the muscles around their airways will tighten and become narrow, swollen and inflamed.

Asthma Inhaler

This can be accompanied by a build- up of sticky mucus (phlegm) that can narrow the airways even further making it hard for the sufferer to breathe.

Asthma Symptoms

The following are symptoms of asthma:

  • Wheezing
  • Shortness of breathe
  • Coughing
  • Tightness

Not everyone will experience all of the above symptoms and the severity of the symptoms will vary from person to person.

What is an Asthma Trigger?

Anything that irritates the airways and brings on the symptoms of asthma is a trigger. Just like the symptoms, these can differ from person to person and some sufferers may have several triggers. Common asthma triggers included:

  • House dust mites
  • Animal fur
  • Pollen
  • Tobacco smoke
  • Mould and fungi

Treating Asthma

There is no cure for asthma but there are effective treatments which can help to control it, relieve the symptoms and prevent future symptoms and attacks developing. Both the treatment and prevention of asthma comprises of the following:

  • Medicines
  • Lifestyle
  • Advice
  • Identifying asthma triggers
  • Avoiding asthma triggers

The dreaded dust mite

You can take steps to make your home as ‘asthma friendly’ as possible. If you have identified which indoor asthma triggers make your condition worse and know what other potential triggers to look out then you can put measures in place to avoid them.

For example, dust mites are a known asthma trigger and they live in the dust that builds up in the home. Unfortunately, it is impossible to completely rid your home of all house dust mites but there are ways in which you can reduce them.

Here’s a few of them:

  • Washing your bed linen weekly in a 60 degree wash – this will help prevent dust mites from living in your bed.
  • Specially designed covers for pillows, duvets and mattresses (known as allergy ‘barrier systems) will stop dust mites from getting into the bed.
  • Hoover on a regular basis, invest in a vacuum cleaner with a good filter system, one that picks up the dust and dirt really well.
  • Keep your home well-aired or install a ventilation unit such as the PIV System. A PIV unit supplies a continuous flow of fresh, filtered air into a property, usually from a central position (hallway, landing or loft).

By keeping the home well ventilated, high levels of humidity are controlled. Dust mites thrive in dwellings where the humidity levels are high, therefore, by controlling the humidity levels in the home effectively you are also controlling and reducing the dust mite population.

House Dust Mites > < Asthma & Allergies  

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