Allergies occur when your body’s immune system reacts to substances in the environment that do not bother most people. These substances are known as allergens.

If you are exposed to an allergen that you are sensitive to, you can develop an allergic reaction that leads to redness and swelling, which can be irritating or uncomfortable.

Allergic reactions can affect your:

• Nose and/or eyes – hay fever (allergic rhinitis and/ or conjunctivitis)
• Skin – eczema or hives
• Lungs – asthma

Want to know more?

If you would like to view copies of our useful guides, find out more information on managing your conditions or get tips on how to avoid common asthma and allergy triggers, please go to Living with Asthma & Allergy.

Medical Disclaimer
Although all care has been taken, these publications are a general guide only and are not intended to be a substitute for individual medical advice or treatment. Any questions regarding a medical diagnosis or treatment should be directed to a medical practitioner. The National Asthma Council Australia expressly disclaims all responsibility (including for negligence) for any loss, damage or personal injury resulting from reliance on the information contained herein.

Content Updated 20 December 2009