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A 37-year-old female asked:

3 days after pfizer first vaccine the injection site is swollen, red, itchy and warm to touch. the swelling is about as wide as the bottom of a mug. (also some bruising). muscular pain has subsided. is this normal or a minor allergy/infection?

2 doctor answers4 doctors weighed in
Dr. Stanley Katz
Dermatology 48 years experience
many times this reaction is common. see dermatologist if rash and discomfort worsen. should subside within several days
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Dr. Bennett Machanic
Neurology 53 years experience
Post-vaccine reactions vary in intensity, but most last 1-3 days, and resolve by that point. Your experience is not too dissimilar to slightly more intense reactions. This is not an allergy, and doubt infection, but have your doctor look at this. Would urge you to get reassured and obtain second Jab as scheduled.
Created for people with ongoing healthcare needs but benefits everyone.
Last updated Jun 7, 2021

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