keyhole lip
Achieving the 'keyhole pout' involves using a simple string placed against the bow of the upper lip and at the centre of the lower lip. When your therapist injects dermal fillers (between 0.5–1.0 ml) into the lips, it creates a subtle division between the lower and upper lip. The keyhole lip injection technique is when filler is placed strategically to create a small gap between the upper and bottom lips, so it resembles an actual keyhole. This buzzy look is trending because it gives the lower lip a fuller and pouty appearance while still remaining natural.