Question:
Are hair extensions [made from real human hair] permissible in Islam? If not than what is the reason?
Answer:
In the Name of God, Most Merciful, Most Kind
Thank you/ Jazāk Allāh Khayr for contacting Mathābah with your query.
In Islam, using hair extensions from human hair is prohibited due to the Prophetic prohibition in narrations. One may use synthetic hair extensions if they wish. – (See: Aḥsan al-Fatāwā and Fatāwā al-Hindīyyah).
One logical explanation of the prohibition is that this is tampering with God’s creation which is forbidden according to the instructions of the Qurʾān. This act is also attributed as a devilish action in the Qur’ānic verse 4:119.
“Allah has cursed the woman who joins [her or someone else’s] hair [with the hair of another man or a woman] and also the woman who asks for her hair to be joined [with the hair of another person].” – (Ṣaḥīḥ Bukhāri)
And Allāh Knows Best