Hello, as far as the situation you described is concerned, it should not be the reason why milk and mushrooms are mixed, because medically speaking, they can be eaten at the same time without any reaction. Milk generally reacts easily with some substances containing tannins. Mushrooms contain protein, amino acids, vitamins and other nutrients, without tannin.

Let children eat less indigestible food. If you vomit after eating mushrooms and drinking milk every time, it is recommended to take your child to the hospital.