Local reactions...: Most local swelling, redness and pain at the injection site begins within 24 hours of the shot. It usually lasts 2 to 3 days, but with dtap can last 7 days. This is ok. If redness starts to spread, is large (>1 in), or begins >48 hours after shot, call doc. For more info see: http://www.Seattlechildrens.Org/medical-conditions/symptom-index/immunization-reactions/.
Answered 11/17/2013
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