Hair coloring for breastfeeding women may cause adverse effects on the baby. Hair dyes are mostly some chemicals, and if a breastfeeding woman dyes her hair with hair dyes, the chemicals in the hair dyes will enter the blood circulation and then may enter the breast milk, which may have an adverse effect on the baby. Hair dyes can have an irritating odor, which may damage the baby’s respiratory tract and adversely affect the baby’s health, so it’s best not to dye your hair while breastfeeding. Breastfeeding is a sensitive period, must be careful not to blindly use some cosmetics, not to mention blindly use drugs, because some toxic substances may be absorbed by the baby through the milk, thus affecting the baby. Women should eat more food rich in protein during the breastfeeding period, such as eggs, pork lean meat, soy products, milk and so on. It is also necessary to properly supplement shrimp, fish, pork liver, oats, walnuts, peanuts and other foods, eat more fresh vegetables and fruits, to ensure that the intake of food nutritionally balanced, to avoid a single nutrition. If there are uncomfortable symptoms during breastfeeding, you need to consult your doctor first if you need to use medication, and it is relatively safe to use medication under the doctor’s guidance.