Children with lactose intolerance should avoid adding foods containing lactose when introducing solid foods. Additionally, you can make some food at home for the baby, such as cooking thin porridge, boiling noodles for the baby, mixing a lumpy soup, etc. You can also give the baby small amounts of fruits and vegetables, but they need to be cut into small pieces or juiced before feeding. The main treatment for lactose intolerance is dietary therapy, which involves avoiding foods containing lactose to effectively control and alleviate the symptoms of lactose intolerance in babies, such as milkshakes, cheese, and other dairy products which should not be fed to the baby.