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An allergy is when a person's immune system perceives something that is usually harmless as a threat to the body and launches an attack called an immune response.

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Q: Why does pollen trigger an allergic reaction in some people?
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Related questions

Can African violets cause an allergic reaction?

Yes, African violets emit pollen which can trigger an allergy.


Why can pollen be a problem?

Pollen can make people with hayfever sneeze and suffer from watery eyes. This is an allergic reaction.


When pollen is blown in the air some people have an allergic reaction called?

Hay fever


Can you have an allergic reaction to a magnolia tree?

Yes tree pollen including magnolias can cause some people to have allergic reactions.


What are people most allergic to?

Here are some things that people are commonly allergic to:Bed bugsPoison Ivy


Does pollen cause hayfever?

Yes, if you are allergic to it. There all sorts of pollen and the main ones that cause hayfever are grass tree and weed pollens. Mould spores also trigger allergies. It all depends on your sensitivity level or trigger point. If you have a low trigger point to a particular allergen - whether it is pollen or dust or pet dander - then it won't take much of that allergen getting in to your body through your nose to trigger your reaction. If you have a high trigger point then you might only get a reaction on the worst of the pollen days - or maybe you won't react at all because you never reach your trigger level. So reducing the amount of allergen in your immediate vicinity will help with hayfever. That's why people use pollen blockers and pollen barriers on their nose, and it's also why air purifiers in the home can be helpful.


Which part of the flower is responsible for an allergic reaction in some humans?

Pollen


People who are allergic to pollen are said to suffer from?

If you have a Pollen Allergy then you suffer from Allergies Type 1, also called Contact Allergies. There is no general allergy to pollen. People that are allergic to pollen are allergic to the pollen from one or more specific plants. Source:www.allergies-team.com


What are the main causes for Benadryl allergy?

The main causes for Benadryl allergies are allergies to animals, insects or pollen. Further to this, allergic reactions trigger allergens, making your immune system overact, meaning symptoms can occur from an allergic reaction to any substance.


What is a sentence for allergic?

i am allergic to pollen. So I can not smell flowers.


Why do you get hayfever?

It is typical to get Hayfever during the spring or summer months. It is an allergic reaction that the body undergoes when the pollen from growing things enters the body. The bodies immune system reacts to the presence of pollen as if it were an infection; that is why a person experiences cold like symptoms during an allergy attack.


Is citronella harmful if you are allergic to grass?

Some people are allergic to grass pollen and suffer from hay fever. People are not usually allergic to grass. If you suffer from hay fever you can eat food containing citronella as the stem is used not the pollen.