Postpartum hair loss generally begins one to three months after childbirth, gradually leading to noticeable hair loss. This is primarily due to hormonal changes in postpartum women, with a decrease in estrogen accelerating the rate of hair loss. Additionally, postpartum women are often physically weaker, with deficiencies in vital energy and blood leading to insufficient nourishment to the scalp, thereby worsening the hair loss. The condition is usually most severe three to four months after childbirth. From six to twelve months postpartum, this phenomenon generally gradually subsides, and if it is not too severe, treatment may not be necessary.