1.Postpartum hair loss is very common, just varying in severity. Generally appear about 2-5 months after delivery, 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 decrease, 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 regarded as a physiological phenomenon, there is no need to worry or fear excessively. Keep a happy mood, regular work and rest, eat less greasy and stimulating food, and pay attention to postpartum hair hygiene, do not dye and perm hair.