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For the same reason that some people are allergic to peanuts or milk and others aren't. It's partly environmental (based on your exposure to the offending item) and partly genetic. My brother used to catch and crush (yeah he was troubled) bees, and they often stung him. One day he had a severe reaction and has to avoid bees. Maybe it's karma but his doctor says he developed the allergy thru overexposure to bee venom. Other people can have a fatal reaction to their first bee sting.
Overexposure to an allergen will result in excessive production of IgE. B Cells in our body usually produce IgG displayed on their surface and very little of this IgG is changed to IgE (a process called Class Switching) in non-respondng individuals. For those who become allergic due to to overexposure the class switching (from IgG to IgE) increases, IgE is the antibody which can bind with mast cells and Basophils which contain active substances leading to allergic reactions. Depending upon the location these active chemicals (Histamine etc) can produce vasodilation, increased permeability of blood vessels, bronchospasm, excessive production of mucous which results in symptoms we see.
What else can I help you with?
Is Cody Simpson allergic to anything?
No, not that I know of. But most people are allergic to something, even if they don't know it.
What is John Lennon allergic to?
As far as most people know he didn't have any allergies.
Is Niall Horan allegric to anything?
Alot of people say he's allergic to cats which im pretty sure he's not.I really don't think he's allergic to cats because he has one.
Is bill kaulitz allergic to anything?
Oh, dude, is Bill Kaulitz allergic to anything? Well, like, technically, I don't have his medical records on hand, but, you know, people can be allergic to all sorts of things, like peanuts, pollen, or even bad jokes. So, like, who knows, maybe Bill carries an EpiPen just in case someone tells him a really lame pun.
Is citronella bad for you?
Citronella is generally considered safe for most people when used in moderation, particularly in products like candles and sprays. However, some individuals may experience skin irritation or allergic reactions when exposed to citronella oil. Ingesting large amounts can be harmful, so it's important to use it as directed. Always consult a healthcare professional if you have specific concerns or pre-existing conditions.
Can peanuts cause allergic reactions in some people?
Yes, peanuts can cause allergic reactions in some people.
Which pets are better for people with allergies?
Every person has a different set of allergies. Some people are allergic to dogs, others to cats. People who risk allergic reactions with their preferences may invest in hypo-allergenic breeds of cats or dogs.
Do tannins cause allergic reactions in people?
Yes
Can you be allergic to vodka?
Yes, you can be allergic to vodka. Different people can have different reactions to different foods and drinks. If people are allergic to wheat, vodka can cause a reaction.
Can people be allergic to onions?
Although no allergic reactions to the bulb of the onion are reported, some people develop an allergic rash after handling the leaves of the plant.
What percent of people are allergic to shellfish?
The issue is that many people who are allergic to "shellfish" are susceptible to more than one kind. For some it may be prawns, and for others it may be crabs. These two specific types contain proteins, in a higher concentration, that cause severe allergic reactions in some people.
What is the fear of latex gloves?
Some people are allergic to latex and it causes severe allergic reactions this is why they are being replaced.
Why don't all people stung by insects develop systemic symptoms of anaphylaxis?
Not all people who are stung by insects develop systemic symptoms of anaphylaxis. This is an allergic condition and different people react in different ways to allergic conditions.
Why do some people have Celiac disease and others don't?
Some people are allergic to gluten while others are not. Gluten makes people allergic to it sick with celiac.
Can you have an allergic reaction to a magnolia tree?
Yes tree pollen including magnolias can cause some people to have allergic reactions.
Can a person be allergic to live crayfish that has not been ingested?
I think that might be possible. I mean, since some people who are allergic to peanuts, CAN get allergic reactions from the smell of the peanut. If someone is allergic to crayfish, they have a chance of getting allergic reactions from the smell of the crayfish. Although, to my knowledge, all I know is that this occurs to certain people. Not all. Depends how severe the symptoms is.
Can cat hair kill you if you are allergic to it?
Yes, cat hair can trigger severe allergic reactions in some people, but it is unlikely to directly cause death. However, complications from severe allergic reactions, such as anaphylaxis, can be life-threatening if not treated promptly.
