9 doctors weighed in:
How long does it take for an allergic reaction like hives to show up after eating something?
9 doctors weighed in

Dr. Steven Machtinger
Internal Medicine - Allergy & Immunology
6 doctors agree
In brief: Not very long
With food allergies hives either alone or as the first symptom of a more serious life-endangering condition called anaphylaxis typically appear within 5 minutes to 2 hours after the first bite.
When appearing in a few minutes hives usually appear around the lips, eyes, face & neck. When 1st appearing after 2 hours hives can appear anywhere. Hives may be delayed as long as 8-12 hours after eating.

In brief: Not very long
With food allergies hives either alone or as the first symptom of a more serious life-endangering condition called anaphylaxis typically appear within 5 minutes to 2 hours after the first bite.
When appearing in a few minutes hives usually appear around the lips, eyes, face & neck. When 1st appearing after 2 hours hives can appear anywhere. Hives may be delayed as long as 8-12 hours after eating.
Dr. Steven Machtinger
Dr. Steven Machtinger
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1 comment
Dr. Brian Novick
I agree with Dr Machtinger...and since nickel is often "hidden" in jewelry and other "surprising places(ie., some buttons on cell phones) you can purchase a nickel test kit (on line)to see if items of which you are suspicious actually contain nickel.
Dr. Brian Novick
Internal Medicine - Allergy & Immunology
2 doctors agree
In brief: Minutes to hours
Reactions to foods usually occur quickly.
..Within minutes to hours. It would be very unusual (? Almost never)to show up a day or more later.

In brief: Minutes to hours
Reactions to foods usually occur quickly.
..Within minutes to hours. It would be very unusual (? Almost never)to show up a day or more later.
Dr. Brian Novick
Dr. Brian Novick
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