Allergies
allergies
This probably isn’t the first time you’ve heard of them. Allergies are so common 20% of Americans have some kind of allergic reaction or another to certain external stimuli whether food, water, or air. But what are allergies?
And why do we get
them?
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Allergies
(Type I Hypersensitivity) are actually a malfunction of our immune system so
that our body becomes hypersensitized and reacts immunologically to typically
non-immunogenic substances. The substances that cause our bodies to become this
way are called allergens.
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In
1906, Viennese pediatrician, Clemens von Pirquet, first coined the term
“allergies” after he observed that certain symptoms of his patients might have
been a response to outside allergens, like dust, pollen, or certain foods.
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Signs and Symptoms
You
know your allergies are starting up again if you experience swelling in parts
of your body. This is called local or systemic inflammatory response, caused by
the presence of allergens. For instance, if your allergies affect you in the
nose, you will experience swelling of the nasal mucosa (allergic rhinitis).
During this condition, you will probably find yourself performing the “nasal
salute” more than necessary as itching of your nose will induce you to wipe
your nose in an upward direction.
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On
the other hand, if the allergies hit you in the eyes, redness and itching of
the conjunctiva often follows. Other common signs of allergies are wheezing and
dyspnoea, bronchoconstriction, and sometimes outright attacks of asthma. You
may also experience various rashes, such as eczema, hives, and contact
dermatitis.
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Systemic
allergic responses are more serious compared to local symptoms. Depending on
the severity of your response, allergies can cause cutaenous reactions,
bronchoconstriction, edema, hypotension, coma, and even death.
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Hay
fever is actually one example of minor allergies caused by airborne pollen. But
aside from environmental factors, allergies may also be triggered by
medications.
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Why do we get allergies?
Our
immune system is a well-trained and disciplined bio-weapon that protects our
bodies from harmful substances. Its mechanics is so amazing that it can
identify and destroy many foreign invaders. However, as amazing as our immune
system is, it makes mistakes sometimes. And so we have allergies, which, as we
mentioned, results from a hypersensitive immune system.
The
hypersensitized immune system misidentifies an otherwise innocuous substance as
harmful, and then attacks the substance with a degree of ferocity that is
greater than required. As a result, we experience problems that can range from
mildly inconvenient to uncomfortable to total failure of major organs of the
body.
How does the immune system go into a hypersensitized state?
There
are actually several ideas on this. Some schools premise that allergies are
almost always triggered by protein. Certain persons have faulty genetic codes
so that their lymphocytes or the white blood cells (the stuff that your immune
system is made of) are unable to property distinguish between the threatening
and the non-threatening proteins.
So,
for example, when you ingest protein from shellfish, your lymphocytes think
that the substance is trying to invade the body. As a result, they produce
large amounts of antibodies which attach themselves to mast cells and basophils
throughout the body. This is known as the sensitizing exposure and this is the
very reason why you suddenly develop allergies.
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With my best wishes