You should not dye your hair if you experience hair loss postpartum, as the scalp is already very fragile during this period. Using chemical agents to perm or dye your hair could further damage the scalp foundation, potentially accelerating hair loss. Additionally, it is not advisable to use chemical dyes during the breastfeeding period postpartum because these chemicals can enter the bloodstream through the scalp and subsequently make their way into the breast milk, potentially affecting the baby's growth and development. Therefore, it is best to avoid dyeing your hair during the postpartum period, especially while breastfeeding and experiencing hair loss.