Allergies (Type I Hypersensitivity) are actually a malfunction of our immune system that triggers our body to become hypersensitive and react immunologically to typically non-immunogenic substances.

The substances that cause our bodies to become this way are called allergens.

Signs and Symptoms

You know your allergies are starting 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.

On the other hand, if the allergies hit you in the eyes, redness and itching of the conjunctiva often follow.

Other common signs of allergies are wheezing and dyspnea, bronchoconstriction, and sometimes outright attacks of asthma.

You may also experience various rashes, such as eczema, hives, and contact dermatitis.

Systemic allergic responses are more serious compared to local symptoms.

Depending on the severity of your response, allergies can cause cutaneous reactions, bronchoconstriction, edema, hypotension, coma, and even death.

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.

Why do we get allergies?

Our immune system is a well-trained and disciplined bio-weapon that protects our bodies from harmful substances.

ts 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 hypersensitive immune system incorrectly identifies 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 hypersensitive state?

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 that 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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