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Doctor insights on: How Long Does An Allergic Reaction Last

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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

Dr. John Chiu
2,716 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 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

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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 does it take for an allergic reaction appear?

How long does it take for an allergic reaction appear?

Depends: Immedite type reactions can occur i minutes. Contact allergies can take several days to show itself. Some drugs reactions can appears as long as 2 weeks after stopping the antibiotic and can persist for up to 6 months. Some sensitivities will not show at the first exposure, will show only with subsequent exposures. ...Read more

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Help please? How long does swelling from an allergic reaction last?

Help please? How long does swelling from an allergic reaction last?

Fairly quickly: Swelling after an allergic reaction usually resolves within 24 hrs of exposure. Swelling that persists for days is not likely IgE-mediated (allergic) and might be due to other causes. See an allergist if you are concerned about persistent swelling/angioedema. ...Read more

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How long does an allergic reaction on the face last?

How long does an allergic reaction on the face last?

Depends: Depends on the type of reaction. Swelling (angioedema) usually lasts 24-72 hours when it reaches maximum. Allergies can last for very long times if not treated. If unsure, the safest bet is to see your friendly allergist for advice and treatment. ...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 quickly does an allergic reaction happen?

How quickly does an allergic reaction happen?

Depends: It all depends on the problem. Allergic reactions can be immediate or take hours or even days to occur. ...Read more

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How long does an allergic reaction take to kick in?

How long does an allergic reaction take to kick in?

Usually fast: Most common allergic reactions to pollen, insect stings, foods, etc., are immediate hypersensitivity reactions, meaning they occur within seconds to minutes. But you can also have a late phase, a second-wave of reaction that occurs hours later. Contact allergies (poison ivy, nickel allergy, e.g.) and some medication allergies are delayed, and may take hours, days, or weeks. ...Read more

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How long does an allergy attack to pollen normally last?

How long does an allergy attack to pollen normally last?

Days to weeks...: If you are continually exposed to pollen, an allergy attach could stretch over days to weeks (in fact, you could be sneezing or wheezing for the entire pollen season). ...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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How long should symptoms of an allergic reaction last?

How long should symptoms of an allergic reaction last?

Allergy duration: The duration of allergic symptoms are very variable. The type of reaction (ige vs. Igg), persistance of exposure, degree of sensitization, and comorbidities (other illnesses) can all affect the duration of symptoms. Therefore reactions can last from minutes to months. ...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 do allergic reactions usually last?

How long do allergic reactions usually last?

Depends: For medication reactions, if the drug is stopped, symptoms improve within 1-2 days. Food allergic reactions will subside within hours to a few days after avoiding the culprit food. For eczema triggered by food allergies, it may take up to a week. Poison ivy reactions may take several weeks to resolve depending on the severity. Treatment can shorten the duration of an allergic reaction. ...Read more

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How long does a dust mite allergic reaction last?

How long does a dust mite allergic reaction last?

It depends...: On the amount and duration of exposure. If you're allergic to dust mites and you fluff up a pillow on the way to the washing machine, probably 30 minutes. If you sleep on a pillow without an allergy cover, the all-night-long exposure might last a couple of hours, or if you're highly allergic to dust mites, it might last all day. ...Read more

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Target lesion allergic reaction how long does it last for ?

Target lesion allergic reaction how long does it last for ?

Depends: One thing you need to consider is Lime Disease from a tick bite. Should consult a doctor promptly to confirm it so that you can get it treated. There are also other conditions with target lesions and the duration would depend on what has caused it. Rush to your doctor's office now. ...Read more

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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 does a minor allergic reaction last like a minor itchy rash?? Without any medication??

How long does a minor allergic reaction last like a minor itchy rash?? Without any medication??

Depends: On the stimulus (allergen), the route, and the exposure duration, if ingested might take some time till eliminated, at any rate if it is minor as you described it should be only hours at the most ...Read more

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Help please? How long does swelling from an allergic reaction last?

Fairly quickly: Swelling after an allergic reaction usually resolves within 24 hrs of exposure. Swelling that persists for days is not likely IgE-mediated (allergic) and might be due to other causes. See an allergist if you are concerned about persistent swelling/angioedema. ...Read more

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How long does a dust mite allergic reaction last?

It depends...: On the amount and duration of exposure. If you're allergic to dust mites and you fluff up a pillow on the way to the washing machine, probably 30 minutes. If you sleep on a pillow without an allergy cover, the all-night-long exposure might last a couple of hours, or if you're highly allergic to dust mites, it might last all day. ...Read more

See 1 more doctor answer
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How long does an allergic reaction on the face last?

Depends: Depends on the type of reaction. Swelling (angioedema) usually lasts 24-72 hours when it reaches maximum. Allergies can last for very long times if not treated. If unsure, the safest bet is to see your friendly allergist for advice and treatment. ...Read more

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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

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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 does an allergic reaction from a latex condom usually last for? And, what are the symptoms of it? Can it be dangerous?

Different: It can be different for different patients. Some will just have a rash and other patients will have trouble breathing and almost die. Please see allergist or dermatologist for treatment. ...Read more

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How long should symptoms of an allergic reaction last?

Allergy duration: The duration of allergic symptoms are very variable. The type of reaction (ige vs. Igg), persistance of exposure, degree of sensitization, and comorbidities (other illnesses) can all affect the duration of symptoms. Therefore reactions can last from minutes to months. ...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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Target lesion allergic reaction how long does it last for ?

Depends: One thing you need to consider is Lime Disease from a tick bite. Should consult a doctor promptly to confirm it so that you can get it treated. There are also other conditions with target lesions and the duration would depend on what has caused it. Rush to your doctor's office now. ...Read more

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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

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How long would it take for allergic reaction to take place and how long would it last?

How long would it take for allergic reaction to take place and how long would it last?

Variable: All i can say is variable. Once someone has developed an allergy to something a reaction will take place fairly quickly after exposure. As long as you continue to be exposed the reaction will continue. Once you stop exposure then the reaction will often slowly ramp down but may require steroids (topical or systemic). ...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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For how long can an allergic reaction to condoms or lubricates last?

Days: Length of reaction to a single exposure would likely be days. If true allergy, would be expected to recur with greater severity. Try non-latex condom? ...Read more

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How long should an allergic reaction symptom to an antibiotic last for?

How long should an allergic reaction symptom to an antibiotic last for?

Antibiotic allergy: Antibiotic allergies can clear up in a day or last up to six months. Fortunately, most resolve relatively quickly, over a few days. We do not yet know why some persist for a long time and require strong medications like oral steroids (e.g. Prednisone) in order to settle down. ...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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Dr. John Chiu
1,078 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