It is not permitted for a woman to shave her head except in cases of necessity because the Prophet (peace and blessings of Allah be upon him) forbade women to shave their heads.

In Islam, wearing wigs is generally prohibited as it is associated with the imitation of non-Muslim customs and falls under the broader ruling against hair extensions.

Dyeing hair with pure black dye is prohibited in Islam. Prophet Muhammad said: "Change this but avoid black." But if the black dye is mixed with another colour, so that it is no longer black, there is nothing wrong with it.