Acidic foods

Guys, my daughter cannot eat any type of fruits or acidic foods it seems like. The acid causes her butt to get red when she pees/poops! I feel like she can’t eat anything that’s acidic. She usually has strawberries, blueberries, or oranges with her breakfast and then mandarin oranges with her lunch. I feel like even a tiny bit will make her butt red. I feel like she can’t eat anything😕😕 I know it’s from the fruit because she will eat them, then poop a little bit after, and her butt will be red right after. I change her as soon as she’s done.