Drink some milk before meals to increase satiety and avoid overeating because of hunger, which is also very suitable for people who lose weight.
As for drinking milk after meals, it is not recommended. At this time, if your stomach is full, drinking milk will make your stomach more "bloated" and uncomfortable. Extra calories also increase the risk of obesity.
It is ok to drink milk before going to bed. Sometimes I feel hungry before going to bed. Protein and fat in milk can provide some energy for your body and relieve hunger. This is much healthier than eating instant noodles, mala Tang or hamburgers before going to bed.