Breaking out in hives

Last night, this morning and again tonight, DS has broken out in hives on his face and legs. We have given him nothing new to eat and have not changed anything (i.e detergent). He is almost 3 - I gave him some benadryl and it seems to help. I am concerned but wondering when I should start thinking about taking him to his ped?

Re: Breaking out in hives

I know someone that gets hives from temperature changes, usually after a shower or when jumping into a cold pool. Could it be related to that?

Are there any new household items? Is anyone in the family around an animal when not at home? Have you used any new cleaning items or different brand of something?

I hope you get to the bottom of it.