If the mother is breastfeeding her baby, she will need to wait until she is weaned before coloring her hair, otherwise it is best to color her hair after the puerperium is over. The amount of time you can color your hair after giving birth depends on how long you have been breastfeeding and how well your body is recovering. If you are breastfeeding your baby, you should wait until you have weaned your baby because the harmful substances in the hair dye may leak into the bloodstream from the skin and blood vessels on your head and pass to your baby through your breast milk, which may affect your baby’s growth and development. If you are not breastfeeding your baby, it is best to wait until the end of the puerperium to color your hair. This is because before the end of the puerperium, the mother’s body has not fully recovered, and harmful substances in hair dyes may enter the bloodstream through the skin and blood vessels, affecting the body’s recovery. Hair coloring after the body has fully recovered to normal will generally not cause adverse effects on the body. If a woman in the clinic feels unwell, she should go to a regular hospital in time and be treated under the guidance of a doctor, so as not to delay her condition.