Less milk during the day and more milk at night may be due to different stimulation of the baby’s suckling. The secretion of milk in lactating women is affected by lactogen. The sucking stimulation when the baby is breastfeeding can promote the secretion of lactogen, so it is generally recommended that the baby should be allowed to breastfeed as early as possible after delivery to help promote lactation. Some babies are formula-fed during the day and breast-fed at night. Therefore, the baby’s sucking stimulation on the nipple is less during the day, and the mother’s milk will be less during the day and more at night. In addition to the baby’s sucking stimulation, emotions can affect milk secretion. If a breastfeeding woman is in a bad state for a long time, such as tension, anxiety, anger, etc., it will also affect milk secretion. Postpartum women must pay more attention to rest, do not strain, keep a calm mind, family members should also give more comfort and care, encouragement, to create a warm and quiet atmosphere for maternal rest.