The main hazards of labial bleaching are as follows: 1. After the labial bleaching, the coloring may fail, which will not only make the labia look better, but will also cause the color to become black and not get the effect you want. 2. Labial bleaching is an invasive operation, which may cause pain in the labia. Therefore must pay attention to observe their physical symptoms, when there is an abnormal situation is recommended to go to the regular hospital for treatment.