Postpartum hair loss is related to changes in hormone levels in women after childbirth. After giving birth, the level of estrogen in the body decreases, causing the hair that was in the growth phase before childbirth to enter the resting phase, and it will begin to fall out after a certain period. Generally, hair loss starts three to five months postpartum and gradually becomes a concern. Additionally, psychological factors can also cause hair loss. For example, mothers may experience mental stress and constant worry, which can affect the quality or quantity of hair. Nutritional deficiencies can also lead to insufficient nourishment for the hair, causing hair loss.