Mothers dyeing their hair may have an impact on the baby’s development, may affect the baby’s appetite, irritating flavor affects the baby’s mood as well as chemical substances may lead to baby misuse and allergies and so on, newborns should minimize contact with chemicals and reagents. 1. affect the baby’s appetite: breastfeeding women generally breastfeeding, hair dye in the chemical residue in the hair more pungent, the baby is relatively sensitive, smell may affect the baby’s appetite. 2. affect the baby’s mood: the chemical part has a very stimulating odor, in the hair dye within a few days is not easy to dissipate, the baby came into contact with the stimulating smell, may appear irritated, easy to cry and so on, is not conducive to the baby’s rest. 3. There may be accidental ingestion and allergy: just after dyeing the hair, hair dye chemicals may remain in the mother’s hair by the baby’s scratching hair and eating hands and other actions into the body, the chemical substances in contact with the skin may also appear allergic to the situation. Therefore, mothers should avoid dyeing their hair during the breastfeeding period, and if they want to dye their hair, they should wait until the breastfeeding period is over before dyeing their hair.