c. It is forbidden for a Muslim woman to create gaps between her teeth for the sake of beauty by filing them with a rasp until slight spaces appear. If, however, the teeth are deformed and require corrective work to remove the deformity, or are decayed and must be treated to eliminate that decay, there is no harm in doing so, for this falls under medical treatment and the removal of a defect. Such work should be carried out by a qualified female dentist.

d. It is likewise unlawful for a woman to have tattooing done on her body, for the Prophet ﷺ cursed both the wāshimah and the mustawshimah. The wāshimah is the woman who pierces the skin of the hand or face with needles and then fills the punctures with kohl or ink; the mustawshimah is the one on whom this is done. Tattooing is therefore prohibited and counts among the major sins, because the Prophet ﷺ pronounced a curse upon the person who does it and the one for whom it is done, and a curse is only pronounced for a grave sin.

e. The ruling on dyeing, coloring the hair, and wearing gold:

1. Dyeing (khidāb): Imām al-Nawawī said in al-Majmūʿ (1/324): “Dyeing the hands and feet with henna is recommended (mustahabb) for married women because of the well-known hadiths on the matter.” End of quote. He is referring to the report recorded by Abū Dāwūd: “A woman asked ʿĀʾishah (may Allah be pleased with her) about dyeing with henna, and she replied, ‘There is no harm in it, but I personally dislike it; my beloved, the Messenger of Allah ﷺ, used to dislike its odor.’” The report is also transmitted by al-Nasāʾī. And ʿĀʾishah (may Allah be pleased with her) said, “A woman once signalled…"