Drinking milk on an empty stomach hurts your stomach. In the fasting state try not to drink milk, because milk contains more water, if you drink milk on an empty stomach, it will dilute the stomach acid, thus affecting the digestion and absorption of the gastrointestinal tract.

And if you drink milk on an empty stomach, the gastrointestinal peristalsis will be faster, and the nutrients in the milk can't be absorbed, and because milk contains a lot of proteins, amino acids, these nutrients, if they are not digested and absorbed into the intestines, the bacteria in the intestines decompose these substances, and they will be transformed into harmful substances, which will have a great impact on the health of the intestines.

So it's better to drink milk after eating in small amounts.