Baby sleeping hand hungry?

Baby hand eating is not necessarily hungry when sleeping, because baby hand eating is an innate habit that has been formed in its fetal period. However, if it has not been fed for a long time, it will eat hands when it feels hungry when sleeping, and it will wake up crying when it is hungry. In the case of not sure why the baby eats hands, you can help the baby take out his fingers first, and then put the nipple or pacifier on the baby's lips to test it. If the baby is hungry, he will naturally suck and want to hold the mother's nipple or pacifier.