Yogurt allergy

Hello mommies. My 1yr old baby had a not severe yogurt allergy reaction yesterday, just few tiny hives. Doctor is not really responding, must be busy with the covid situation right now. Anyhow, just wondering because a friend told me to not let him eat other food that can cause itchiness like clam soup, chicken, eggplant. Is that true? I mean he only had a yogurt allergy reaction, not really related to clam soup and chicken. I really want to feed him this clam soup bcos this is great for babies.