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How allergies develops in our body?

How allergies develops in our body?

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 鈥渘asal salute鈥?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 wheezing and dyspnoea, 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 cutaenous 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.

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