Whether drinking milk before bedtime will cause harm to the baby is mainly related to the amount of milk that the baby drinks, drinking milk before bedtime is not necessarily harmful to the baby. If you drink a small amount of milk before going to bed, let the child move properly after drinking milk before going to bed, and before going to bed should let the baby rinse his mouth or brush his teeth, which is conducive to preventing the milk residue corrosion of the child’s teeth. These precautions to do, generally will not cause any harm to the child. If you give your child a large amount of milk before bedtime, immediately after drinking milk to sleep, and did not let the child rinse his mouth or brush his teeth, it may cause some harm to the child, for example, because of the development of the gastrointestinal system of the smaller children is not yet perfect, due to a large amount of milk, often increase the burden on the gastrointestinal tract, may cause indigestion. And after drinking milk without brushing teeth, rinse mouth, may form tooth decay. As you can see, parents should pay attention to reasonable to children drink milk, to avoid causing harm, if the symptoms of physical discomfort, should take the child to seek medical attention in a timely manner.