It is not recommended to perm hair during breastfeeding to avoid triggering or aggravating hair loss, increasing the chance of skin inflammation and affecting the quality of breast milk. 1. Induce or aggravate hair loss: during the breastfeeding period, due to changes in the endocrine system and the consumption of nutrients, it is easy to have hair loss symptoms, and the hair dye and perm agent used in perming and coloring hair contain chemical ingredients, which may lead to the destruction of the hair follicles and the hair quality, and induce or aggravate the symptoms of hair loss. 2. Increase the chance of skin inflammation: During the breastfeeding period, women’s immunity and resistance are relatively poor, and after contact with hair dyes and perms containing chemical ingredients, allergic reactions may occur, increasing the chance of skin inflammation. 3. Affecting the quality of breast milk: after contact with hair dyes and perms, the chemicals contained in them may be inhaled into the bloodstream through the blood vessels on the surface of the skin, which in turn affects the quality of breast milk and has an impact on the health of the child. To summarize, perming or dyeing hair during breastfeeding is relatively harmful, so it is not recommended.