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Doctor insights on: Onion Allergy Intolerance

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I have IBS and a dairy intolerance, I have noticed lately that i cannot eat bacon or onion or i feel sick, can this be an allergy?

I have IBS and a dairy intolerance, I have noticed lately that i cannot eat bacon or onion or i feel sick, can this be an allergy?

Diet: In general, foods high in fat, fried foods, spicy foods, alcohol, and caffeinated coffee and tea can be problematic. Some foods, such as beans, cabbage, broccoli, brussels sprouts, cauliflower, peas, onions, and bagels, that can cause minor discomfort .You have also lactase deficiency which is often associated with ibs and limits dairy intake. More likely related to ibs than allergy.Consult md. ...Read more

Dr. John Chiu
2,479 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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How common are allergies to onions?

How common are allergies to onions?

Onion Allergy: Not very although it is possible; just depends on what your allergic reaction is. Because onions grow in the ground, it might be that you are allergic to grass or weeds but have a cross-reactive reaction taking place called oral-allergy syndrome. ...Read more

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What is an allergy compared to intolerance?

What is an allergy compared to intolerance?

Immune system: Allergy is caused by an immune response (usually IgE) to a foreign agent- usually a protein. Intolerance is not mediated by an immune system but something unique to that person. Some may be psychological in nature ...Read more

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What is the difference between allergy and intolerance?

What is the difference between allergy and intolerance?

The immune response: An allergy is caused by specific cells and/or proteins in the body that are designed to recognize specific sites in the allergen, i.e. Peanut, walnut, cat dander, etc. These include immunoglobulin e, and t and b cells. An intolerance is caused by an inability to digest a sugar or protein, but does not involve the same immunoglobulins and cells. ...Read more

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What's the difference between an intolerance and allergy?

What's the difference between an intolerance and allergy?

Broad v specific: An allergy reaction is a very specific sort of immune response involving a specific set of cells and inflammatory mediators. An intolerance has a much broader definition and is typically not an immune system reaction. Lactose intolerance, for instance, is an enzyme deficiency that makes one unable to digest lactose. ...Read more

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How would an allergy/intolerance to rice present itself?

How would an allergy/intolerance to rice present itself?

Uncommonly: Rice is one of the foods that is typically included with exclusion diets, because it is rarely a cause of allergic reactions. Any food allergy can cause respiratory problems/asthma, rash, diarrhea, pain, etc. Generally, would occur in people with a history of more general allergic reactions. ...Read more

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What can I do about possible food intolerance or allergy?

What can I do about possible food intolerance or allergy?

Food allergy: 1. Accurate diagnosis, which may involve blood or skin tests. I usually use both. 2. A trial of specific food elimination with a food diary to track symptoms. 3. Food reintroduction, possibly in the setting of an in-office challenge depending on your history. This procedure should help you delineate which foods truly cause problems for you. Avoidance is the only available treatment right now. ...Read more

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Could food intolerances get worse or turn into allergies?

Could food intolerances get worse or turn into allergies?

Yes and no: Food intolerance like lactose intolerance can certainly get worse. However, they do not become food allergies. That is not to say you cannot develop food allergies if you have a food intolerance, but the two are not related. ...Read more

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How to get tested for allergies/intolerances at the doctors?

Skin or blood test: Allergists can perform blood or skin prick testing in the office to determine environmental and food sensitivities which could indicate allergy. ...Read more