hay fever

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hay fever,

seasonal allergyallergy,
hypersensitive reaction of the body tissues of certain individuals to certain substances that, in similar amounts and circumstances, are innocuous to other persons. Allergens, or allergy-causing substances, can be airborne substances (e.g.
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 causing inflammation of the mucous membranes of the nose and eyes. It is characterized by itching about the eyes and nose, sneezing, a profuse watery nasal discharge, and tearing of the eyes. The cause is a sensitivity to one or more species of pollens or fungi. In addition, many patients with hay fever develop other allergic conditions, e.g., asthmaasthma
, chronic inflammatory respiratory disease characterized by periodic attacks of wheezing, shortness of breath, and a tight feeling in the chest. A cough producing sticky mucus is symptomatic.
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 and sinusitis. In the spring, hay fever may be caused by tree pollens (oak, elm, maple); in summer, by grass pollens, wheat or corn rusts, or fungus spores; in late summer and fall, by ragweed pollen, which is the most common cause. Temporary relief of symptoms may be obtained from antihistamines and decongestants, such as ephedrine. Physicians may resort to corticosteroids in severe cases. Sometimes desensitization measures are taken, consisting of repeated injections of small amounts of the allergen (pollen) until its presence produces no symptoms; however, the treatment must be continued from year to year, since immunity is not permanent. Some relief can be obtained by removing pollen from the air by air conditioners and filters.

Hay Fever

 

an allergic disorder in man, caused by sensitivity to the pollen of certain plant species. Hay fever belongs to the group of pollinoses. The disorder appears during the flowering of grasses and trees. Pollinoses may be spring, summer, or autumn reactions, depending on individual sensitivity to a certain species of pollen and on the time of flowering of the offending plant. Clinical manifestations include irritation of the mucous membranes of the nose and eyes and, less frequently, attacks of asthma. Treatment involves specific desensitization between attacks and the use of such symptomatic preparations as ephed-rine, Adrenalin, and antihistamine preparations during the allergy season. Prophylaxis includes changing the place of residence during the hay-fever season and other means of avoiding contact with the allergen.

hay fever

[′hā ‚fē·vər]
(medicine)
An allergic disorder of the nasal membranes and related structures due to sensitization by certain plant pollens. Also known as allergic rhinitis; pollinosis.

hay fever

an allergic reaction to pollen, dust, etc., characterized by sneezing, runny nose, and watery eyes due to inflammation of the mucous membranes of the eyes and nose
References in periodicals archive ?
There is no cure for hayfever but most people are able to relieve symptoms with treatment such as antihistamine tablets, which can help prevent an allergic reaction from happening and corticosteroids (steroids) in the form of nose drops, which help reduce levels of inflammation and swelling.
Brake and Direct Line's survey found that nearly a third of drivers are unaware some hayfever and allergy medications can impair the ability to drive.
The images of his swollen face bear a striking similarity to the reaction suffered by eight-yearold Leo Patterson, who appeared in Monday's Record after a sudden hayfever attack while playing in a park near his home in Dumfries.
Talking about its potential impact on the exam season, he said: "The symptoms of hayfever can be pretty miserable with runny eyes, sneezing, a constantly dripping nose, itchy throat and ears.
Adrian Morris, Clarityn Rapide's expert consultant from the Surrey Allergy Clinic in London explains: "The countryside with high summer levels of tree and grass pollen was always presumed to be bad for hayfever sufferers, but what most people don't know is that in urban areas, these pollens attach to the diesel exhaust particles from cars.
With nearly a third (30 per cent)[2] of sufferers admitting that their hayfever symptoms are as debilitating as flu, it may come as no surprise that 7 in 10 people (72 per cent) admit to phoning in sick[2].
Now the breakfast presenter for TFM says fortunately he's never suffered hayfever at work.
Hayfever sufferers usually start having symptoms in early spring if allergic to tree or weed pollen and from late spring if allergic to grass pollens.
Extra supplies have been ordered at pharmacies as demand for remedies has risen sharply among the 10 million hayfever sufferers in Britain.
But having worked my way through enough antihistamine pills, prescribed by my GP to try to alleviate the symptoms of hayfever, I've reached the point that not even those seem to do the trick anymore.
An incredible one in five people will suffer from hayfever this summer, according to new figures released to mark National Allergy Week.