Asthma can range in severity from a slight inconvenience at times to life threatening during severe asthma attacks. Regardless, it is important you are aware of the signs and symptoms of asthma and an asthma attack, so you can be prepared. Signs and Symptoms vary from person to person.5
Common Signs and Symptoms of Asthma
- Breathlessness
- Chest tightness or pain
- Persistent coughing
- Wheezing (common symptom in children)
- Lethargy
- Worsened symptoms due to a respiratory virus
Asthma Triggers
Various allergic and non-allergic triggers (or factors) can cause people to experience sudden asthma symptoms. Triggers can vary widely from person to person.
Allergic triggers initiate an allergic reaction. This reaction leads to inflammation and/or tightening of the respiratory muscles, limiting airflow and producing common asthma symptoms.5
Allergens often include:
- Food allergies
- Pollen
- Pet dander
- Mold spores
- Dust mites
Non-allergic triggers do not cause inflammation but do cause bronchial muscle spasms.5
Non-Allergic Triggers Include:
- Exercise and intense exertion
- Intense emotions
- Environmental irritants
- Cold or dry air
- Smoke
- Air pollution
- Chemical fumes
- Fragrances
- Respiratory infections
References
1. Asthma Canada. Asthma Facts and Statistics. https://asthma.ca/wp-content/uploads/2020/07/Asthma-101.pdf
2. Institute for Clinical Evaluative Services in Ontario (ICES) 1996. ICES Practice Atlas (second edition), June 1996
3. Bellamy D, Harris T. Poor perceptions and expectations of asthma control: Results of the International Control of Asthma Symptoms (ICAS) Survey of patients and general practitioners. Primary Care Respiratory Journal. Vol 14, Issue 5, October 2005. Pages 252-258
4. GINA Global Strategy for Asthma Management and Prevention, 2020.
5. Asthma Canada Website. https://asthma.ca/get-help/understanding-asthma/
6. The Lung Association. Asthma Medications.
7. Suggett, J., et al. Drug Delivery to the Lungs, 2017.
8. Gillen, M., et al. Pulmonary and Therapeutics, 2018 Oct; 52:8-17.
9. The Ontario Asthma Surveillance Information System (OASIS) and the Institute for Clinical Evaluative Sciences (ICES), Ontario. Asthma statistics. http://lab.research.sickkids.ca/oasis/oasis-statistics/
10. Government of Canada. Fast Facts about Asthma: Data compiled from the 2011 Survey on Living with Chronic Diseases in Canada.
11. World Health Organization. Asthma Key Facts. Retrieved from https://www.who.int/news-room/fact-sheets/detail/asthma
12. Pritchard, J.N. (2020). The Climate is Changing for Metered-Dose Inhalers and Action is Needed. Drug Design, Development, and Therapy. Volume 14, 3043-3055.