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Allergies cause the immune system to react abnormally to the allergen that has entered the body. One of the more common allergies is pollen. When this allergen has entered the body, The immune system will attack it. Even though pollen is harmless, your immune system sometimes may think that a pathogen (germ) has entered the body, therefore causing the body to produce histamine. Your doctor will give you antihistamines if you are allergic to something. Antihistamines will stop symptoms such as a runny-nose, watery eyes and itchy eyes.

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12y ago
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14y ago

allergies can effect how a person absorbs nutrients. if you dont get he proper nutrients your immune system can be compromised. except in the case of celiac disease which is not a food allergy. It is an actual immune response to gluten (wheat and other grains). Google celiac disease for more info.

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11y ago

When a person has an allergy, it means their immune system mistakes the thing they are allergic to for a threat. The immune system then sends antibodies to attack it as though it were a bacteria or virus. These antibodies are what causes allergy symptoms.

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Q: How are allergies a result of immune system malfunction?
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