What is the ruling on a woman using henna?

Question : She asks: What is the ruling on using henna? And if a woman adorns herself with it for her husband, since I have heard from some sisters that you forbid it and say that whoever uses it is a sinful woman, I seek refuge in Allah. On the contrary, we see that there is no harm in using henna.

Answer : Henna is a specific type of dye that they apply to the hair. I think some women cut their hair in layers. This is permissible in principle, but if it prevents water from reaching the hair, we hold that it should not be used by anyone who performs wudu.