Praise be to Allah.
Tattooing means to prick the skin with a needle and inject kohl or some other substance to change the skin colour to blue or green. This is haraam according to the consensus of the scholars.(al-Mughni 1/94)
Al-Bukhaari and Muslim narrated that ‘Abd-Allaah ibn Mas’ood (may Allaah be pleased with him) said:
“Allaah has cursed the women who do tattoos and the women who have this done, the women who pluck their eyebrows, and the women who file their teeth for the purpose of beautification and change the creation of Allaah.”