<s>[INST] My son was born 8/22/08 and during his scheduled appointment on 10/22/08 he received his vaccinations DTAP-HEPB-IPV, HIB-OMP, DTAP-HEPB-IPV. After getting home I noticed the injection site was inflamed and red and disregarded it as normal injection side effects and did what doctor told me to by warm compresses and rubbing it.It started off as a red spot half the size of a pea. To this day it is still there and has grown as he has grown and is now the size of a nickel.It flares up from time to time and looks almost like a hive at times and itches and swells up to the size of a quarter or half dollar. Frustrated,I can not figure out what this is.Any suggestions? [/INST] It is most probably a foreign body reaction, caused by the injection. It is increasing in size with the growth of the child. If it is causing any symptoms it needs to be removed, usually it is symptomless. To confirm get a ultrasonography done. Also check on the immune status of the child, get Hepatitis B antibodies (HBsAg) done. </s>