We have hesitantly started to vax DS2, and he received DtaP last Tuesday. Last night after his bath, I noticed that his leg where he got his shot was red and swollen around the injection site. DH did not realize what it was, and said he had thought it was a bug bite, since DS2 had been complaining all day that it itched. I checked more closely, and noticed hives in a roughly 6" diameter circle around the injection site. Allergic reaction? I am placing a call to the doc this AM, but thought I would get feedback here from my mama tribe. We did treat with an anti-itch cream and benadryl. Hives are still present this morning.