Allergies arise, when an individual is sensitized to a known substance, that provokes an allergic reaction. These substances are called allergens, or triggers, because they cause an overreaction in the body's immune system. There are naturally occurring allergens, such as pollens, environmental substances, like chemicals, and the foods that we eat, mostly proteins, amongst numerous types of food.
The four different avenues in which allergens can enter our bodies:
Inhalation - as with pollen and dust mites.
Eating - as with some foods.
Absorption - via the skin, as with some chemicals and plants.
Injection - some people are allergic to drugs, such as penicillin
When an allergic person encounters allergens, for the first time, the symptoms don't occur, but the defense mechanism is sensitized. Consider it, as getting ready to resist allergens, that it mistakenly assumes to be aggressors, intent on doing harm to our bodies.
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Having become hypersensitive to a specific substance, the next time the immune system experiences the same type of allergen; it automatically mass-produces antibodies to cope with the perceived threat. The antibodies bind with the allergens, and as they circulate throughout the body, they react with other cells. Then substances, including histamine, create inflammation, that is a common allergy symptom. Allergies differ in many people, and the symptoms range from something as mild as a runny nose, to anaphylaxis, which is sometimes fatal.
Fortunately there is no shortage of allergy advice or allergy information.
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why do allergies arise?
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