Allergies – Definition, Causes, Symptoms and Cure
June 8th, 2007 . by steveAllergies – Treatment of Allergies with Effective Remedies
What are these conditions?
Allergies are reactions to airborne (inhaled) allergens – substance, that can produce hypersensitivity reactions such as a runny nose and eye inflammation. Some allergies, such as hay fever, are seasonal Others occur year-round (perennial allergies).
Allergies affect over 20 million Americans. They’re most prevalent in young children and adolescents but occur in people of all ages.
What causes them?
Hay fever is a hypersensitivity response brought about by antibodies, called immunoglobulin E. In most cases, hay fever is induced by windÂborne pollens: in the spring, by tree pollens; in the summer, by grass pollens; and in the fall, by weed pollens. Occasionally, allergy to fungal spores induces hay fever.
In year-round allergies, the allergens provoke responses year Âround. Major year-round allergens and irritants include dust mites. feather pillows, mold, cigarette smoke, upholstery, and animal danders. A seasonal pollen allergy may worsen the symptoms of yearÂround allergies.
What are their symptoms?
In seasonal allergies, the main signs and symptoms are sneezing spells, a runny nose with profuse watery discharge, nasal congestion. and itching of the nose and eyes. The person usually has swollen nasal passages, reddened eyes with swollen eyelids, excessive tearing, and headache or sinus pain. Some allergy sufferers also complain of an itchy throat and a general ill feeling called malaise.
Year-round allergies usually cause only a runny nose and nasal congestion. But they can cause chronic nasal blockage, which then blocks the auditory tube that extends from the middle ear to the throat (called the eustachian tube). Blocked eustachian tubes are especially common in children with year-round allergies.
In both seasonal and year-round allergies, “allergic shiners” (dark circles) may appear under the eyes. The severity of signs and symptoms may vary from season to season and from year to year.
How are they diagnosed?
\With allergies, the person’s sputum and nasal discharge usually contain large amounts of a type of white blood cell active in hypersensitivity responses called eosinophils. Blood tests show normal or elevated immunoglobulin E antibody levels.
For a firm diagnosis, the doctor takes a personal and family history of allergies and considers physical exam findings. To pinpoint the responsible allergens, he or she may order skin testing and assess the person’s responses to environmental stimuli.
To rule out a common cold, which mimics an allergy, the doctor checks for typical cold symptoms, such as fever, sore throat, beet-red nasal mucous membranes, and nasal discharge without eosinophils. In a child, the doctor checks for a foreign body in the nose, such as a bean or a button, which can cause allergy-like symptoms.
How are they treated?
Treatment aims to control allergy symptoms by eliminating environmental allergens, if possible, and by drug therapy and a special treatment called immunotherapy.
Drug therapy
Antihistamines may be given, although these commonly cause sedation, dry mouth, nausea, dizziness, blurred vision, and nervousness. Newer antihistamines, such as Seldane, have fewer side effects and are less likely to cause sedation. However, an overdose of these drugs may cause irregular heartbeats.
Some people get relief from inhaled intranasal steroids, which reduce inflammation without causing the systemic side effects of antihistamines. The most commonly used intranasal corticosteroids are Nasalide, Beconase, and Vancenase. Unfortunately, during acute allergy attacks, these drugs rarely give relief. Nasal decongestants and oral antihistamines may be needed instead.
Immunotherapy
For long-term allergy management, the doctor may recommend immunotherapy. In this treatment, the person receives increasingly large doses of the offending allergens to gradually develop immunity. The doses are administered before or during allergy season or year Âround
What can a person with allergies do?
• If the doctor has prescribed intranasal corticosteroids, use them regularly, as directed, for optimal effectiveness.
• If you’re taking Nasalcrom, be aware that although this drug can help prevent allergies, it may take up to 4 weeks to work. Also, you must take it regularly during allergy season.
• Call the doctor if you have a delayed reaction to immunotherapy .
• To reduce your exposure to airborne allergens, sleep with the windows closed, and use air conditioning to filter allergens.
• If you have severe and resistant allergies, you may have to consider drastic lifestyle changes, such as moving to a pollen-free area, either seasonally or year-round.