DD got hives for the first time I noticed about a week or two ago on her back and legs. They showed up and disappeared relatively quick (within a couple hours). It happened again last week after eating a smoothie but on her shoulder and made her arm swell slightly. Disappeared in an hour or so, and then also happened again yesterday. I'm thinking they're caused by tomato sauce and/or strawberries.

They don't seem to be bothering her when it happens but it does kind of bother me. WWYD? Make a ped appt or more wait and see approach?