A Triangle piercing is one of several forms of female genital piercing. The piercing passes from side to side, through the base of the clitoral hood tissue where it meets the inner labia and under the clitoris.
In addition to serving as adornment, it increases the intensity of sexual stimulation, particularly during sexual intercourse. The name is derived from the tissue where the labia meet the clitoral hood, which looks like a triangle when pinched. This is the only genital piercing that can stimulate the clitoris from behind it. It is said to be one of the more painful genital piercings due to it passing though so much tissue and nerves.