Is the application of henna by a woman in Ihram considered a prohibited adornment?
Chapter on What the Muhrim Must Avoid and What is Permissible for Him
Al-Mughni
Book of Hajj
Primary text
Applying henna is permissible for a woman in the state of Ihram. It is considered an adornment that is permissible because the default state is permissibility, and there is no explicit textual evidence or scholarly consensus prohibiting it in this state.
Supporting text
The view held by Al-Qadi is that it is disliked because it is an adornment, drawing a parallel to kohl made from antimony, which is disliked for the Muhrim (one in Ihram).