Postpartum milk shortage, also known as postpartum milk shortage, refers to the postpartum breastfeeding period, maternal milk is very little, or even completely absent, can not meet the baby’s breastfeeding needs. The causes of postpartum milk shortage include: 1, insufficient source of milk: due to maternal Qi and blood weakness; 2, poor milk flow: due to liver depression and Qi stagnation or phlegm congestion; 3, congenital factors: such as congenital breast nipple dysplasia, family history of breast deficiency; 4, other: milk production is also related to maternal sleep, nutrition, emotions and health status.