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 ?
For further information about hay fever eyes, including symptoms, frequently asked questions and tips to help cope with hay fever, log on to the new Opticrom website at www.
Hay-Band customer survey of approximately 100 hay fever sufferers conducted in 2008
Mark Fielding, a Saltburn-based acupuncturist, said there are alternative ways to reduce the unpleasant symptoms of hay fever if people do not want to take medication.
Very few people have such bad hay fever that ordinary treatments are not enough.
Grass hay fever season has already begun to affect sensitive sufferers and reaches its zenith in late June, but Dr Morris predicts that people will experience the worst effects at the end of May because most sufferers do not medicate until after symptoms have begun.
For best results take Pollenna when hay fever symptoms first appear, suck or chew tablets at two hourly intervals for six doses, then three times daily until symptoms subside.
House dust mites and pets are mostly to blame but symptoms will become worse in summer if you are allergic to pollen - the main cause of hay fever.
Other evidence supports the link between hay fever and shyness, the researchers contend.
can on and 17STRESS LESS SLEEP AND EXERCISE MORE Research at the University of Worcester shows stress can make hay fever symptoms worse - it's thought stress hormone cortisol affects the immune system.
THE hay fever season has just started and rising pollen levels throughout the coming summer months will lead to misery for around 15 million people in the UK.