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Doctor insights on: Allergy Develop

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Dr. John Chiu
2,638 Doctors shared insights

Allergies (Definition)

Allergies occur when your immune system is triggered by envirionmental factors it should ignore--for example, pollen in the air, or dander on a cat or dog--and creates cells to fight against them. An allergic reaction typically causes itching, congestion, or drainage, and ...Read more


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Why do allergies exist? Why do some people have allergies while others do not? Why do some allergies develop later in life?

Why do allergies exist? Why do some people have allergies while others do not? Why do some allergies develop later in life?

Immune system: It is the immune system, and it is genetically determined, we are all born with the propensity to be allergic to something at some point in our lives, which might not come at all, may be because we don't become exposed to what we would react to, anyways, our immune sydtems can tolerate certain exposures to certain limits, people differ in that threshold, hence react differently, ...Read more

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Is it possible that a food allergy develop after years of eating the food?

Is it possible that a food allergy develop after years of eating the food?

Yes: This would be unusual but can happen. The classic case is the adult who develop a food allergy to shellfish after being able to eat shellfish for years. ...Read more

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It possible that a latex allergy developing after years of wearing gloves?

It possible that a latex allergy developing after years of wearing gloves?

Yes: Certainly so. An allergic reaction basically requires some variable period of sensitization before an obvious reaction. And that time period can vary widely. ...Read more

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Docs, could a food allergy develop at any age?

Docs, could a food allergy develop at any age?

Yes: Food allergy can develop at any age. One more thing to remember is a positive allergy testing to food does not necessarily equate to allergy to that particular food. Food allergy testing give us an idea or probability of having a reaction to that food. An allergist can discuss with you about specifics if you have further question. ...Read more

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Can allergy develop to asthma? & what's the best medicine? Thank u.

Can allergy develop to asthma? & what's the best medicine? Thank u.

YES and NO: Children and adults with asthma tend to have higher ige levels than individuals without asthma, although there is no absolute cutoff that distinguishes between the two groups. The increase in elevated total ige in asthmatics compared to nonasthmatics is generally driven by atopic individuals.

Ask your dr. Best response. ...Read more

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How can a gluten allergy develop?

How can a gluten allergy develop?

Genetic: It is genetic although most of the people with the genes do not develop gluten sensitivity. ...Read more

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Can a milk allergy develop in a one year old?

Can a milk allergy develop in a one year old?

Yes possible: 1 year olds can develop milk allergy. However, it is important to rule out other causes. Depending on what type of allergic reaction you think the milk is causing, there could be other contributing factors. Before eliminating a food from your child's diet, recommend seeing a specialist for proper diagnosis. ...Read more

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Can a food allergy develop as an adult. I have been eating sesame foods since I was a child and always had no issues. I'm confused! ?

Can a food allergy develop as an adult. I have been eating sesame foods since I was a child and always had no issues. I'm confused! ?

Yes: You can develop a food allergy any time in your life even though it is more common in early childhood. If you have allergic symptoms to sesame seeds, you need to pay attention to peanut as well since they share some common allergens. Sesame seed oil however is tolerated by most but not all. ...Read more

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Can allergies developed at the age of 17 outgrown. Ige level 302 while normal is till100. Absolute eosinophil count 410. Breathlessness is it asthma?

Can allergies developed at the age of 17 outgrown. Ige level 302 while normal is till100. Absolute eosinophil count 410. Breathlessness is it asthma?

Yes: Allergies can develop at any age. While your numbers are elevated, they are not so bad that you need panic or run to er. Call your primary care doctor or an allergist so you can discuss your specific symptoms, have a good check-up that focusses on areas involved (for instance your lungs) and then any tests, (breathing, blood, etc) that can enlighten both you and doc as to cause of symptoms and tx. ...Read more

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Is it possible to stop a cat allergy from developing in my son?

Is it possible to stop a cat allergy from developing in my son?

Sort of: The less exposure, the better. If he is genetically predisposed to develop a cat allergy, there is enough cat dander in the environment that he probably will. However, the more exposure he has, such as going for daycare in a home with cats, or - worse - bringing a cat into the home to live with him, the more likely he is to develop a cat allergy, and the worse the symptoms will become. ...Read more

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If I haven't eaten peanuts in a long time, could that cause an allergy to develop?

If I haven't eaten peanuts in a long time, could that cause an allergy to develop?

No: A peanut allergy could develop at any time whether peanuts are being eaten intermittently or even regularly. It's not exactly clear why peanut allergies develop, but it does require 1) exposure ie eating peanuts, 2) sensitization--the body's immune system see the peanut protein as "foreign" and 3) re-exposure---that's when symptoms occur. ...Read more

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Can a food allergy just develop? Had a laparascopy a month ago, could the general anasthetic trigger a food allergy? No medication taken after op

No: General anesthesia cannot trigger a food allergy. If you are allergic to a food, you were susceptible to the allergy to begin with. It has nothing to do with having anesthesia. General anesthesia cannot modify your body's genetically determined immune response to allergens. However, intraoperative allergic reactions can occur with anesthesia in people with certain food or drug allergies. ...Read more

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How long does it take for food allergies to develop? If you have delayed allergic reactions, is it possible to eventually become anaphylactic?

How long does it take for food allergies to develop? If you have delayed allergic reactions, is it possible to eventually become anaphylactic?

Food allergy: A person, due to the right timing of exposure in the predisposed, can develop food allergies at any time in her/his life to any food. However most food allergies are due to the common highly allergenic foods, such as nuts seafood milk eggs soy ; wheat. It is unknown if delayed reactions can become anaphylactic; however if there is evidence of an ige reaction to a food, caution is the best remedy. ...Read more

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I catch colds often. I am told it mostly allergies that develop into cold like symptoms. It is recommended that I take omnaris + zyrtec (cetirizine). Opinions?

I catch colds often. I am told it mostly allergies that develop into cold like symptoms. It is recommended that I take omnaris + zyrtec (cetirizine). Opinions?

Think sinusitis: This cold be allergy. If so omaris and zyrtec (cetirizine) are good options. Singular is another medication to consider. I would also be thinking about recurrent or chronic sinusitis... See you local ENT or an allergist. You may need a ct of the sinuses. ...Read more

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Could allergies just suddenly develop?

Could allergies just suddenly develop?

Yes: Allergies can develop at any age and ca n develop suddenly. ...Read more

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How does someone develop allergy to something?

Sensitization: You have to see the substance at least once (maybe many more times) to prime your immune system into recognizing it. The next time you are exposed after that, your immune system will see the substance and start an allergic reaction. The likelihood of this happening depends on one's inherent predisposition to develop allergies, as well as the route, amount, and duration of exposure to the substance. ...Read more

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Can I develop allergy symptoms later on in my life?

Can I develop allergy symptoms later on in my life?

Yes: While most people who develop allergies are children or young adults, a person is never too old to develop an allergy. I have seen people in there 80's who developed dust allergies for the first time while in their 60's or 70's. Medication allergies can occur any time, but especially in older people taking multiple medications. Food allergies are less like to begin in the elderly. ...Read more

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Is it possible to develop allergies all of a sudden?

Is it possible to develop allergies all of a sudden?

Allergy or not: Although often present in childhood allergic diseases can occur at any age. However not all "allergic symptoms" are caused by allergies. Check with your primary care physician or a board certified allergist. ...Read more

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Can you just develop allergies at any time and at any age?

Can you just develop allergies at any time and at any age?

Yes: While food allergies are more common in children, they can occur in adults. Pollen allergies usually takes 3 pollen seasons for sensitization followed by symptoms. I saw an 80 yr old man with dust mite allergy with symptoms that developed at age 65 yrs. Elderly are less likely to develop allergies, but it happens. It's unclear why the immune system tips toward allergies--much research on this. ...Read more

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Is it possible to develop allergies from visiting a polluted city?

Yes: Air pollution can aggravate allergy symptoms and even cause problems in people without allergies. People with lungs problems should avoid high levels of air pollution whenever possible. ...Read more

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Can you please tell me if I will develop allergies if I purchase a used smoker car?

Can you please tell me if I will develop allergies if I purchase a used smoker car?

Likely not: It is likely not. In general when we mention about allergies, it is understood that we talk about aero allergens like pollens, mold spores, dust mites, cat / dog danders. It is unlikely that you are sensitized to pollens or to other aero allergens mentioned above if you just expose to a used smoker car. However, cigarette smells in the car might cause irritation of your nasal mucosa or airway. ...Read more

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Is it possible to be allergic to everything? I seem to be developing allergies to several different foods amongst other things.

Is it possible to be allergic to everything? I seem to be developing allergies to several different foods amongst other things.

Food allergy: Although rare, some people are allergic to so many foods that avoidance is extremely difficult. Unfortunately, some persons are told they are allergic to a food solely on the basis of an allergy test (typically a rast). A rast detects allergic antibody (ige) however; a positive rast does not diagnose food allergy. If you can eat a rast (+) food without allergic symptoms, then you are not allergic. ...Read more

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Can you develop allergy to latex?

Can you develop allergy to latex?

Yes: It is possible to develop allergy to latex, even in adulthood. Unfortunately, the testing for establishing a diagnosis is not as accurate as other allergy tests. ...Read more

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Me: can you develop allergies after childhood? Adolescence? Adulthood?

Yes: You can develop allergies at any age. Even in your elderly years, although this is less likely. ...Read more

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