A member asked:

After my first allergy shot i had a bad reaction. how long will it take for the red blotches and swelling to go away? dr. gave me steroids.

A doctor has provided 1 answer
Dr. Cody Mead answered

Specializes in Family Medicine

Give it a week: The initial symptoms of itching/swelling should go away fairly quickly - in the first 48 hours. The redness may last for a little while longer. Best of luck!

Answered 5/23/2015

2.8k views

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