Hair dyeing by the mother may affect the baby’s appetite, affect the baby’s mood and lead to allergies in the newborn. 1. Affecting the baby’s appetite: Nursing women need to supplement nutrition for their babies through breastfeeding, and the chemicals used in hair coloring will remain on the hair after dyeing, and the smell is relatively irritating, which may affect the baby’s appetite. 2. Affect the baby’s mood: some hair dyes will have a very obvious smell of chemicals, and the baby close to this irritating smell of chemicals may lead to the baby’s emotional instability, irritability and so on. 3. lead to newborn allergies: after dyeing the hair part of the chemical substances are not cleaned will stay in the hair, and newborn skin is delicate, more sensitive, the chemical substances may come into contact with the baby’s skin allergic situation. So newborns still try to avoid hair coloring, to be breastfeeding after the end of hair coloring.