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Allergies are caused because the immune system reacts in a hypersensitivity to substances that are usually harmless in nature. These substances are called allergens and can be swallowed, inhaled or can contact with skin. Allergic reactions are predictable, and rapidly acquired. Some common allergies include allergies caused by food, hives, asthma, hay fever, eczema, and reactions caused by insect bites such as bees and wasps. If the allergy treatments are not administered, these reactions can develop so that they can even cause death.

allergy symptoms are classified as mild, moderate or severe reactions. Mild symptoms include rash, itching, tearing and redness. These reactions do not usually spread. moderate symptoms include itching and difficulty breathing. Severe symptoms are called anaphylaxis. These are rare and life-threatening emergencies. The body responds to allergens very suddenly and these allergens affect the entire body. Symptoms usually begin with itching eyes or face and then spread to other parts of the body. Within minutes, the mild or moderate symptoms may progress to more severe symptoms that include swelling that makes breathing, and swallowing difficult and they can even cause abdominal pain, cramps, vomiting, diarrhea, dizziness and confusion .

Three treatments of allergy in general. One is avoiding the allergen, the second is to take medication to relieve symptoms and treatment of allergy third is to take allergy shots.

Avoid wearing masks includes pollen, staying indoors when the pollen grains, which are the most common allergens are abundant in the air, reading food labels carefully and avoid animal dander production at home, using cotton pads and linens and wash them regularly and removing carpets and upholstered furniture or other products listed. You should use air filters, dehumidifiers and cleaning products or acaricide containing tannic acid.

Where complete avoidance is not possible, medication is necessary, in the form of allergy treatment. medicines are the most common decongestants, nasal passages clear that, antihistamines, which prevent the action of histamine and cromolyn, usually contained in drops or nasal spray.

Immunotherapy is also another form of allergy treatment that is taken even when no medication can control allergic reactions. Immunotherapy desensitizes people with the help of injections containing allergen extracts. This process takes months to show results and will take three to four years before a patient can be free of symptoms.

source: http://ezinearticles.com/4622078