Allergies (Type I Hypersensitivity) are actually a malfunction of our immune system that triggers our body to become hypersensitized and react immunologically to typically non-immunogenic substances. The substances that cause our bodies to become this way are called allergens.
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.
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 follows. Other common signs of allergies are...
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