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Arlington, VA
A 38-year-old female asked about a female:

4 year old received kinrix (dtap/ipv) vaccine yesterday and has large bruise, mild swelling and hard knot at injection site - normal?

1 doctor answer1 doctor weighed in
Dr. James Ferguson
Pediatrics 46 years experience
Not uncommon: These vaccines are injected into muscle which may knot up for several days after the injection.If the needle passes through a small vein during the injection it can bleed more than usual, producing the bruise. The swelling would be a response to both. It is not uncommon or considered an "allergic" response.

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Last updated Jan 5, 2016

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