Food rash?

Hi! We recently started foods such as green beans and my daughter loves them, but we noticed about 7 hours later (she eats some baby food along with her bottle at 11:30) she starts to scratch her stomach until it’s just red, but stops not long after. We are taking a break from green beans for awhile just to be safe but has anyone else had this experience? I know a rash is a sign of allergen but we also live in the south and spent some time outside, but I can find no indications of a bug bite (bump, or bite marks). We will be mentioning this to her pediatrician at her next appointment I was just curious if anyone else had this experience with green beans. The redness doesn’t turn to hives and she has no other issues.