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Offers resources on hay fever or hayfever, also known as allergic rhinitis or seasonal allergies, including the signs and symptoms, causes and prevention, care and control.
Allergic rhinitis was once known as hay fever because farmers would develop an allergic reaction when they worked in the fields during hay pitching season. Today it refers to a collection of symptoms that are caused by all kinds of pollen.
Source: HealthyOntario.com
Ragweed pollen is the principal cause of hayfever and can also trigger asthma. A good breeze can take pollen on a journey of hundreds of kilometers.
Source: HealthyOntario.com
Allergic rhinitis is an inflammation of the nasal mucosa, the membrane or tissue that lines the inside of the nose. Most of us know it simply as hay fever. It can occur at any time of the year, but is more common in the spring and fall.
Source: HealthyOntario.com
There are two kinds of hay fever. The most common, known as seasonal allergic rhinitis, is an allergic reaction to pollens released by trees, grasses or weeds. A second type of hay fever is called "perennial allergic rhinitis". People affected by perennial allergic rhinitis are affected by allergies year-round. Their hay fever is caused by indoor allergens such as dust mites, mould, and furry animals.
Source: The Canadian Lung Association
You have an allergy when your body reacts to things that don't cause problems for most people. These things are called allergens. Sometimes the term hayfever is used to describe a reaction to allergens in the air.
Source: The College of Family Physicians of Canada
A great number of people of all ages suffer from allergies, yet not everyone knows what allergies are and how they are caused. Having an allergy means having an overreaction of your immune system to substances that are benign for most people.
Source: HealthyOntario.com
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