Good evening. The pediatrician said that the baby has allergies to pho…

Good evening. The pediatrician said that the baby has allergies to photos. I know that she eats yogurt and I suspect it's probably on this and for now I'm not feeding her. She didn't say anything more. Question: what did you do when your child had an allergy? Maybe such tests? Or did your doctor give you any medications or something to apply? How long did the rash last for you and do bath with chamomile or marigold help? I will read the answers and see if it's worth going to another doctor))