Postpartum hair loss is not due to kidney deficiency, but because during childbirth, the level of hormones in a woman's body decreases. During pregnancy, the hormone levels are higher, which slows down the metabolism of the hair, and extends the lifespan of the hair, thus reducing hair loss. After childbirth, due to the decrease in estrogen levels, hair loss occurs. It is more than during pregnancy, but not too severe. Hair loss is also related to insufficient nutrition and lack of sleep after childbirth. It is recommended to ensure adequate sleep and enhance nutritional intake after giving birth.