How do people become allergic to things?

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AN allergy is a condition that is caused by the hypersensitivity of an individual’s immune system to something that’s present in their environment. People can become allergic to things in two ways. They can either be allergic to something from birth due to their genes, or they can become allergic as they grow up.

An allergy occurs when our immune system mistakenly recognises a foreign particle (also known as antigens) as a threat to the body and responds by attacking it. This causes many other immune cells to follow suit, all of which get activated to protect the body from the antigens.

The symptoms like runny or stuffy nose, sneezing or even the accumulation of large amounts of lethal fluids within the lungs, are the results of the immune system’s attacks on antigens. Moreover, the allergy can get worse if that person is constantly exposed to that particular allergen.

As the person maintains exposure to those allergens, more and more anti-allergen immune cells are produced by the person’s immune system, which can lead to severe symptoms over time.