It is not possible to do hair when you are menstruating. Because whether you straighten your hair, dye your hair, or perm your hair, the hair dye or perm water used will contain carcinogenic dioxins, which are very harmful to the human body, but when you are menstruating your body is in a relatively low resistance and immunity, so do not do your hair during this period. It is recommended to do hair when you are not menstruating, and it is not recommended to do hair during pregnancy, breastfeeding and before preparing for pregnancy, because it may cause some harm to the embryo of breastfeeding or pregnancy, so do not dye your hair or perm it when you are menstruating.