Doctor insights on:
How Long Does Rash From Food Allergy Last
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
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
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
One day to years: If the dust mite exposure is avoided, symptoms may resolve in a few hours without treatment. If there has been significant, prolonged exposure, it may take weeks or months to resolve without treatment. If the mold exposure cannot be avoided, the symptoms will last indefinitely. ...Read more
Variable: Allergic contact dermatitis rash (poison ivy) can take several weeks to resolve. Rashes related to medication allergy generally improve within 48 hours of stopping the medication. Hives can wax/wane for days, weeks, months or even years. Hives can come and go within hours. If a person has continued exposure to an allergen, the rash is likely to persist. ...Read more
Depends: If it is a hive, it should subside in ...Read more
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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