Hair loss during breastfeeding is commonly seen 2-7 months after delivery, manifested by a receding hairline, or an inconspicuous hairline, and thinning and shedding of hair, medically known as childbirth alopecia. The common causes of childbirth alopecia are as follows: 1. Estrogen, estrogen level is very high during pregnancy, estrogen can slow down the renewal of hair, so that the life span of the hair that should be lost is prolonged, and the level of estrogen decreases rapidly after delivery. It will make the hair overdue for service have fallen off, the new hair is difficult to grow up for a while, so that the hair appeared green and yellow state.2. Mental factors, postpartum new mothers all kinds of maladaptation, hard work caused by postpartum mental tension, easy to hair loss.3. Nutritional imbalance. Influenced by local customs, some pregnant women’s diet after delivery is subject to many restrictions, which may cause nutritional imbalance, resulting in hair loss. In fact, there is no need to be too nervous and anxious about childbirth hair loss, which is the body’s normal response to rapid changes in estrogen.