My son is 6 months of age and recently got his first of two flu vaccinations. A day or two after the shot he started to break out in hives. Everytime he got hot, cried, anything seemed to set them off. Now, he has never been the least bit sick, no fevers or anything. I called the dr. and they said to try to trace it back to the source. My husband and I thought about food that might have changed or new soaps, but the only thing we came up with was the flu shot he had received. My question is: First, do you think it's from that or are we over reacting? Second, if it could be from that, should he get his second shot?