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Doctor insights on: How Long Will A Food Allergic Reaction Last

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On average, how long will an allergic reaction to food last?

On average, how long will an allergic reaction to food last?

Allergic reactions: Food allergic reactions typically begin within 30 munutes of an ingestion and typically peak at about 30 minutes after they begin. The reaction may be short lived, lasting only a few hours (typical) or long-last; possibly for days (rare). ...Read more

Dr. John Chiu
2,660 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 long does an food allergy rash reaction last for a baby?

How long does an food allergy rash reaction last for a baby?

Few days: Once the offending food is identified and removed from the diet, the rash should go away in a few days. Most likely this is not a true food allergy and is some sort of environmental irritant rash. ...Read more

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How long does an average allergic reaction last for?

How long does an average allergic reaction last for?

No average allergy: Everyone's allergic reaction varies. There can be mild symptoms or severe symptoms. You can have continual exposure to the allergen (pollen for example) or acute exposure (like eating shellfish). The cause of the allergy, the severity of symptoms, and other factors all play into how long an allergic reaction occurs. ...Read more

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How long can a rash or another allergic reaction from food usually last?

How long can a rash or another allergic reaction from food usually last?

Depends on the food: Allergic reactions are present as long as the allergen that triggers it is also present. For food, it depends on how much was eaten and if it is eliminated from the body. ...Read more

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Allergic reaction to pineapple how long it lasts?

Hours: Nearly all food reactions subside in less than a day. ...Read more

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How long does an allergic reaction to a vaccine last?

How long does an allergic reaction to a vaccine last?

Vaccine reactions: The duration of an allergic reaction to a vaccine depends on the type of allergic reaction and on the person having the reaction. Reactions like classic allergies, ie hives or "urticaria" may last a few days, whereas those that are more serum sickness-like, with joint pains, sometimes last longer, like weeks or months, and require treatment with steroids. Most reactions are short-lived. ...Read more

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How long after eating allergic food do you have a reaction?

How long after eating allergic food do you have a reaction?

Food allergy timing: You can react in minutes, or it can take many hours. The faster reactions tend to be the most severe and potentially dangerous, even life-threatening, but occasionally, even late reactions can be very dangerous, as in reactions to alpha-gal (http://allergytomeat.Wordpress.Com/frequently-asked-questions/). Atopic dermatitis reactions to foods may not start for a couple of days; last weeks. ...Read more

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How long will hives last if i'm having an allergic reaction to medication?

How long will hives last if i'm having an allergic reaction to medication?

Less than one week: Typically, hives due to a medication will last for only a few days; two weeks tops. Medications that stay in the body for a few days could cause longer reactions. Adverse reactions to medications should always been discussed with and shown to the prescribing physician, so that the true cause is identified, and your chart is marked so you aren't given that medication again in the future. ...Read more

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Food allergy symptoms, how long will it last?

Food allergy symptoms, how long will it last?

Less than a day: If the symptoms you are asking about are really due to food allergy, they should begin almost immediately after eating the food and resolve in several hours but may last a day. ...Read more

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How long does a breakout from a allergic reaction take to heal?

How long does a breakout from a allergic reaction take to heal?

Depends on severity: Minor allegic reactions, with local swelling and itching, usually resolve within 30 to 60 minutes. When someone has a more severe reaction, in which swelling or hives occur, sometimes the reactions take several days to resolve. As always, if you are ever having a reaction in which breathing is compromised or there is swelling in the throat, call 911 immediately. ...Read more

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How long will my topical allergic reaction last for?

How long will my topical allergic reaction last for?

Depends: The most important issue that determines how long it lasts is whether or not you have stopped contact with the allergen. Once you stop touching it, things should look better every day. But i would say that it should be resolved within a week to 10 days. (think of poison ivy...A common topical allergic reaction.). ...Read more

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How long it take for allergy reaction after eating ?

How long it take for allergy reaction after eating ?

What kind?: It depends on what kind of reaction you are talking about. Many adverse reactions to foods are not actually due to allergy and timing can be variable. The worst kind of reaction called anaphylaxis such as to peanut usually occurs right away ie minutes to hours but delays beyond that are very rare. Gluten sensitivity reactions are not immediate. ...Read more

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How long does a servere food allergy take to happen?

How long does a servere food allergy take to happen?

Immediate Symptoms: Food allergies are typically an immediate reaction minutes to a half hour (max 2 hours) after ingestion of concerning food with symptoms ranging anywhere from hives, wheezing, itching, shortness of breath, wheezing, vomiting, throat tightness, or syncope (fainting). If there is any concern see an Allergist for further workup and evaluation with skin prick or serum testing. ...Read more

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How long does an allergic reaction rash from echinacea last?

How long does an allergic reaction rash from echinacea last?

A few days: Rashes from something you ingest typically last for just a few days or less. The bigger question is what really caused the rash. People break out in rashes from time to time, and it's just human nature to blame the rash on something we ate in the last few hours. If the rash is continuing for more than a week, it probably has nothing to do with the echinacea; you should see your pcp to check it out. ...Read more

Dr. John Chiu
1,052 doctors shared insights

Allergic Reaction (Definition)

A sensitivity to substances called allergens that come into contact with the skin, nose, eyes, respiratory tract, or gastrointestinal tract. They can be breathed into the ...Read more


Dr. Heidi Fowler
3,561 doctors shared insights

Nutrition (Definition)

Nutrition is the synergistic combination of nutrients found in food and water that allows the human body to perform all essential ...Read more