Atopic syndrome is an allergic sensitiveness affecting parts of the human body. Its disorder is generally termed as Allergy. The substance that produces this allergy is termed as "allergens". Thus, an allergy is a term used to denote the negative reaction of the body or its tissues to a stimulating substance, called an allergen. An allergy towards an agent causing it can be experienced by a person, while a majority of others around him do not. Many sources estimate that 50 million people in the United States have at least one form of allergy. This roughly translates to about 17 Americans out of every 100 who are allergic to the various allergens recognized by the medical practice.

The types of allergy may be classified into different groups, depending on the causes and targets. They may be airborne allergies, food allergies, skin allergies, insect sting allergies, and allergies to medicines. In many cases, the effects of allergy on a person are not fatal, as it can last for a short time given the proper treatment. However, for persons with severe allergies to certain substances may go into anaphylactic shock, and can possibly cause death. Asthma, as one common form of respiratory allergy, claims the lives of about 5,000 every year, according to a 2005 study by the American Lung Association.

Allergy Symptoms

What happens to a person when he is exposed to something he is allergic to? As the allergen enters the body, whether via the nose, mouth, or skin opening, the immune system immediately acts up by producing Immunoglobulin E or IgE, an antibody. IgE seeks out the allergens and binds with them to form an allergen-antibody complex. This causes mast cells in connective tissues to burst, releasing histamine, which triggers physiological responses like blood vessel dilation, constriction of bronchial muscles, and secretion of mucus. This is why a person feels itchy or has inflamed skin and experiences a runny nose whenever he is exposed to an allergen.

Food Allergy

With regards to food allergies, these may be caused by a variety of food types, including: seafood, milk, peanuts, eggs, soy, fish, and wheat. In 2001, according to the Journal of Allergy and Clinical Immunology, over 200 people per year are estimated to have deaths caused by food allergies. Most people deal with their food borne allergies by choosing alternative types of food that do not contain the abovementioned ingredients.

The following are the common allergic disorders.

Allergic Rhinitis

Allergies to airborne substances can also be referred to as allergic rhinitis. Some examples of airborne allergens are dust, pollen, spores from fungi, and pet hair or dander. Pollen allergy, dust allergy are very common nasal allergies. In the United States, about one out of every five adults and two out of every five children experience this type of allergy. There are also allergies to insect bites and stings, such as those from wasps and bees. A 1999 study explained that over 40 people die per year because of allergies to insect stings. These allergy treatments can be done by administering the drug antihistamine or with epinephrine shots.

Seasonal nasal problems are the symptoms of this disease. The patients will have the inflammation inside the nose after inhaling of those allergic inducers. Adjacent areas, such as the ears, sinuses, and throat will also be affected. Runny nose, Stuffy nose, Sneezing, Nasal itching, Itchy ears and throat and Post nasal drip are the common symptoms of this disease.

Allergy and Asthma

The affected patient will have breathing problem which consequently lead to the inflammation and spasm of the lung's air passages. This inflammation and spasm is due to the limiting of the flow of air into and out of the lungs of the patients. Mostly, this disease is related to the allergies but not always. From the Shortness of breath, Wheezing, Coughing & Chest tightness, this disease is easily recognizable.

Eye Allergies

Medical term for this disease is allergic conjunctivitis. Severe inflammation in the eyes will be felt by the patient who got this disease. This inflammation is followed by the redness under the lids and of the eye overall, watery itchy eyes & swelling of the membranes.

Allergic Eczema/ Skin Allergies

Medically, this is called as atopic dermatitis. This disease is an allergic rash caused by skin contact with the allergen. This is disclosed by itching, redness, and or dryness of the skin. Rash on the face, especially children, Rash around the eyes, in the elbow creases, and behind the knees, especially in older children and adults, rash on the trunk of the body are also seen with the patients.

Hives /Skin Allergies

Hives, medical term urticaria, are skin reactions that appear as itchy swellings.

Allergic Shock

This is a life-threatening allergic reaction known as also anaphylaxis or anaphylactic shock and it can affect a number of organs at the same time.

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