After giving birth to a baby, some mothers may experience abnormal hair loss, which is called postpartum hair loss. In fact, serious postpartum hair loss is normal and mothers need not worry too much. The causes of postpartum hair loss mainly include hormonal changes, mental factors, dietary factors and other three major aspects. Here, we listen to what experts say. 1, postpartum hair loss is very common, but the severity varies. Generally appear about 2-5 months after childbirth, on average 3 months after delivery, off 2-3 months to stop. 2, pregnancy body estrogen and progesterone levels rise, they can promote hair growth, prolong the hair growth period, so the number of hair during pregnancy can increase, and lustrous. With the end of childbirth, the hormone level rapidly decreases, the support role of hair will naturally be reduced, a large number of hair at the same time into the resting phase and fall off, so the phenomenon of hair loss. If there is diffuse hair loss on the entire scalp or patchy hair loss, or if the hair loss does not stop one year after childbirth, please go to the hospital in time. 4, postpartum hair loss can be considered a physiological phenomenon, there is no need to be overly worried or fearful about it. Keep a happy mood, regular work and rest, eat less greasy and stimulating food, and pay attention to the hygiene of postpartum hair, do not dye your hair.