Mothers still produce milk when they feel hungry at night, but prolonged hunger may reduce milk production. Mothers are advised to consume light diet such as porridge, milk and eggs in time to replenish body energy. Milk is produced through the secretion of oxytocin and lactogen by the pituitary gland of the mother. When the placenta is delivered, the level of estrogen and progesterone in the body suddenly decreases, and the pituitary gland starts to secrete prolactin, which promotes the secretion of milk from the breasts. The continuous discharge of milk needs to be through the lactation reflex, and the baby’s frequent sucking on the nipple can stimulate the maternal pituitary gland to continue to secrete lactogen, thereby stimulating the mammary glands to secrete milk. Therefore, if the baby continues to suck, even if the mother feels hungry at night, it will not significantly affect the secretion of hormones, will still produce milk, only due to the body heat less, will reduce or inhibit the secretion of prolactin to a certain extent, so that the amount of milk production is reduced. Therefore, mothers should maintain a balanced diet during breastfeeding to ensure the secretion of prolactin, which in turn promotes milk secretion. It is not recommended to lose weight during breastfeeding, especially in the form of dieting, so as to avoid damage to the body and affect the quality and quantity of milk, which will indirectly affect the growth and development of the baby.