Night mare story: In US, not medically advised. I ended up with a hematoma that was the volume of 1.5″ x 3″ that ruptured at the very top of my clitoris and required an emergency room visit and temporary damage to a nerve route. It was excruciatingly painful…I was having involuntary muscular contractions all over my body due to the pain when I went to the ER. It took 1 month to heal, and 3 weeks off Testosterone.
I know many recommend this for sexual pleasure, but it is anatomically and physically impossible to increase clitoral length…the lesson I got to learn with my Emergency room visit and follow up care.