It is okay for babies to drink milk before bedtime, but they should be careful to clean their mouths.
Babies, especially those before half a year old, need to be fed 7-8 times a day and it is not possible for them to go to bed without drinking milk, otherwise they will be prone to malnutrition and persistent crying at night. However, mothers and fathers can prepare “baby toothbrushes” (actually disposable gauze) for their babies to clean their mouths so as not to produce unpleasant odors or affect the development of teeth.
After six months, but before the age of one, the baby can be weaned from nighttime feeding, and will need to drink a bottle of milk before bedtime to ensure that he or she is nourished throughout the night.
After one year old, you can not drink milk before bedtime; but if you drink milk, you must pay attention to mouth cleaning, otherwise due to the sugar and protein in the milk powder, very trigger dental caries.