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how long does a rash from an allergic

A 47-year-old member asked:
Dr. Tsu-Yi Chuang
49 years experience Dermatology
Days: Usually a few days to week. Rarely over a month.
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A 53-year-old member asked:
Dr. Arnold Beresh
40 years experience Podiatry
See below: Most reactions start from the 1st to 4th dose of a medicine.
A 38-year-old member asked:
Dr. Bin Sung
Dr. Bin Sung answered
33 years experience Pediatrics
Hours to a few days: If it's allergic reaction, stay away from the irritating object and try some anti-histamine. Good luck.
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A 48-year-old member asked:
Dr. Jeffrey Rumbyrt
31 years experience Allergy and Immunology
Hours to days: If the rash you have is from a recent and brief exposure, if you have some topical benedryl cream, it should resolve relatively quickly. If you have ... Read More
A 46-year-old member asked:
Dr. Michael Zacharisen
32 years experience Allergy and Immunology
Variable: Hives or urticaria may wax and wane then resolve within a day or 2 after ingestion or contact with a food allergen. However, poison ivy or nickel all ... Read More
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A 40-year-old member asked:
Dr. Tsu-Yi Chuang
49 years experience Dermatology
Days: Usually not more than a week.
A 51-year-old member asked:
Dr. Nayla Mumneh
28 years experience Allergy and Immunology
Depends: It depends what you reacted to, usually topical steroid creams can help resolve it, it can lastfor days, sometimes more.
A 44-year-old member asked:
Dr. John Overholt
25 years experience Allergy and Immunology
2-3 weeks: Allergic contact dermatitis will resolve in 2-3 weeks if you continue to avoid the offending exposure.
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A 41-year-old female asked:
Dr. Gary Steven
29 years experience Pediatric Allergy and Asthma
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 r ... Read More
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A female asked:
Dr. Ronald Krauser
51 years experience Rheumatology
See detals: Almost immediately if you have previously taken the med or has a known allergy to it. If you have not taken it previously allergies are very uncommon.

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