Very common: It is quite common to develop a slight local reaction, such as a bump on the arm, after pertussis vaccine. Best treatment is a cold compress (wet a washcloth and put it in refrigerator for 5 minutes) and then hold on area involved for 5-10 minutes out of each hour you are awake. Ok to use pain relief meds if you really are uncomfortable, but if just a bump, would not suggest that.
Answered 6/15/2013
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