It is not recommended to dye or perm your hair during breastfeeding. The process of hair coloring and perming will use some chemical agents, which will be absorbed by the human body through the scalp, and may enter the breast milk and be absorbed by the child, and these harmful chemicals will seriously affect the growth and development of the child, and there is even a risk of carcinogenicity, and may cause some blood system disorders. If you really want to dye or perm your hair, it is recommended to choose some purely plant-based formulas of hair dyes and perms, which will have relatively less impact on your baby, but there is no scientific research to confirm that they are harmless to human body, so please choose carefully and it is better not to use them in order to avoid potential risks. In addition, you should pay attention to keep your skin or hair clean and dry within the breastfeeding period.