Q 1: I would like to inquire about henna. It is a substance used by men to dye their white hair, whether in the head or in the beard, so that it becomes red, and by women to dye their white hair or decorate their hands and feet. Is this valid or not?
(Part No. 24; Page No. 108
It is Mustahab (desirable) for men and women to dye their white hair with any color other than black, according to the saying of the Prophet (peace be upon him),
Change the color of that white hair, but avoid black color.
Whether by using henna or any substance that gives another color. As for decoration by henna, it is one of the characteristics of women; it is impermissible for men, as the Prophet (peace be upon him)
cursed the men who imitate women.
As for using henna as a medication when necessary, it is permissible for both men and women, according to the saying of the Prophet (peace be upon him),
Treat yourselves medically, but use nothing unlawful.
May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.