Snuffing out spring fever

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By Paulette Crowley

Hayfever, also known as allergic rhinitis, can be debilitating. It happens when your immune system overreacts to an airborne allergen, which then literally gets up your nose. The allergens cause sneezing, a runny and itchy nose and watery and scratchy eyes. They can also irritate your throat, sinuses and ears. The symptoms of hayfever can make you feel quite sick – like having a cold – and can affect your concentration, sleep, energy levels and performance. It’s also a big contributor to absenteeism at work and school, and can affect how children behave and learn.

WHO GETS HAYFEVER?

Although you may get hayfever as an adult, it’s more likely to start when you’re a child. Children who develop allergies are ‘atopic’, which means they have a tendency for allergic reactions to common environmental allergens. Sometimes this is hereditary, but the allergy only develops when the person comes into contact with the allergen. Penny Jorgensen from Allergy New Zealand says when allergy starts in childhood, the child can go on to develop further allergies in what is known as the ‘allergic march’.

“This is when children first develop eczema in infancy, sometimes followed by food allergy, and then go on to develop allergic rhinitis and then asthma,” she says. “The onset of dust mite allergy occurs often by the age of two, with grass pollen allergy beginning around three to four years of age. Tree pollen allergy develops from about seven years of age. “It can take as few as two to three seasons to become sensitised to pollen, but it depends on the individual.”

COMPLICATIONS

Complications from hayfever include sinus infections and conjunctivitis, says allergy specialist Dr Andrew Baker. Your ears, nose and throat can develop infections from a severe bout of hayfever and you can also be more prone to sleep apnoea, which affects breathing while you’re asleep. Those with hayfever and asthma may get chest infections more often.

SPRING ALLERGIES FROM POLLEN

About half the people who suffer from hayfever are affected during pollen season. It starts with tree pollen in late August, which lasts two or three weeks and can be seen by the yellow dust on your car. The pollen from grass is more of a problem as its season is much longer, lasting until around February. Flower pollen is not airborne: it’s spread by birds and bees.

HAYFEVER AND ASTHMA

Some people wheeze during hayfever, whether they’ve been diagnosed with asthma or not. This is called ‘allergic asthma’: around a quarter of those with hayfever will have asthma and likewise, 80 per cent of people with asthma will have allergic rhinitis. “A sign that asthma has a significant allergic basis is having a tendency for a runny nose or sneezing at the same time as their asthma attacks,” says Dr Baker. “Having hayfever and asthma together can make both conditions worse, so it’s important to try and manage them effectively.”

GET THE RIGHT DIAGNOSIS

To really get on top of allergy symptoms it’s important to get a proper diagnosis. The only proven way to do that is by having a skin or blood test done by a doctor or allergy specialist, says Dr Baker. “The skin test involves putting drops on the skin of things that you might be allergic to via a small scratch. If you get a little itchy spot you are likely to be allergic to that thing.” However, these tests can be tricky to evaluate. “Test results by themselves aren’t always accurate,” says Dr Baker. “Some people can grow out of allergic rhinitis and don’t have the symptoms any more, but they can still have the positive test.”

NASAL SPRAYS

Nasal sprays are the big guns in your allergy-fighting weapons artillery. Decongestants such as Otrivin are designed to provide fast-acting, short-term relief only, so they are no longer effective after three to five days in a row. Steroid-based nasal sprays (corticosteroids), such as Flixonase, are designed to be used long-term. Some people are wary of using them as they contain steroids, but the sprays are different from taking tablets, as 99 per cent of the steroid is not absorbed. The most important thing is that steroid-based sprays must be used regularly for at least four weeks before they start to work, and then they should be used as an ongoing preventer.

ANTIHISTAMINES

Antihistamines are a short-term solution to controlling symptoms. They work by blocking histamine, the chemical your immune system produces when it detects an allergen. This means that symptoms don’t develop when you encounter whatever you’re allergic to. They’re best suited to people who only need to use them from time to time for very mild symptoms of allergy.

This article was first published in Living Well magazine.

 

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