An allergy refers to a mistaken reaction by our immune system in response to bodily contact with certain foreign substances. It is misguided because these foreign substances are usually harmless and remain so to non-allergic people. Substances that produce allergies called "allergens."
Allergies can develop at any age, possibly even in the womb. They commonly occur in children but may give rise to symptoms for the first time in adulthood. Asthma may persist in adults while nasal allergies tend to decline in old age.
Allergic Rhinitis- more commonly called hay fever is the most common of the allergic diseases and refers to seasonal nasal symptoms that are due to pollens. In 1819, an English physician, John Bostock, first described hay fever by detailing his own seasonal nasal symptoms, which he called "summer catarrh." The condition was called hay fever because it was thought to be caused by "new hay."
Year round or perennial allergic rhinitis is frequently due to indoor allergens, such as dust mites, animal dander, or molds. It can also be caused by pollens. Symptoms result from the inflammation of the tissues that line the inside of the nose (mucus lining or membranes) after allergens are inhaled. Adjacent areas, such as the ears, sinuses, and throat can also be involved. The most common symptoms are: Stuffy nose, Runny nose, Sneezing, Nasal itching, Itchy ears and throat, (throat clearing)
Allergic eyes- (allergic conjunctivitis) is a inflammation of the tissue layers (membranes) that cover the surface of the eyeball and the undersurface of the eyelid. The inflammation occurs as a result of an allergic reaction and may produce the following symptoms: Redness under the lids and of the eye overall, swelling of the membranes, watery, itchy eyes.
For some time, it has been known that allergic conditions tend to cluster in families. Your own risk of developing allergies is related to your parents' allergy history. If neither parent is allergic, the chance that you will have allergies is about 15%. If one parent is allergic, your risk increases to 30% and if both are allergic, your risk is greater than 60%
Another major piece of the allergy puzzle is the environment. It is clear that you must have a genetic tendency and be exposed to an allergen in order to develop an allergy. Additionally, the more intense and repetitive the exposure to an allergen and the earlier in life it occurs, the more likely it is that an allergy will develop.
Allergy and symptoms can be categorized as mild, moderate, or severe. Mild allergic reactions can include Rash, Itchy, watery eyes, Congestion, Mild reactions do not usually spread to other parts of the body.
Moderate reactions can include symptoms that spread to other parts of the body, including Itchiness and difficulty breathing.
Severe Allergic Reaction (Anaphylaxis)
Anaphylaxis is a rare, life-threatening emergency in which the body's response to the allergen is sudden and affects the whole body. It may begin with sudden itching of the eyes or face and within minutes progress to more serious symptoms, including Varying degrees of swellings that can make breathing and swallowing difficult, Abdominal pain Cramping, Vomiting, Diarrhea and Mental confusion or dizziness.
Common Allergies And Symptoms
The parts of the body that are prone to react to allergies include the eyes, nose, lungs, skin, and stomach. Although the various allergic diseases may appear different, they all result from an exaggerated immune response to foreign substances in sensitive people. The following brief descriptions will serve as an overview of common allergic disorders.
Asthma- is a breathing problem that results from the inflammation and spasm of the lung's air passages (bronchial tubes). Asthma is most often, but not always, related to allergies. The inflammation causes a narrowing of the air passages, which limits the flow of air into and out of the lungs. Common symptoms include: Wheezing, Coughing, Chest tightness, shortness of breath. Allergies and symptoms can be minor or severe.
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