Maybe it's because it's a factory type, but they made it very short. Maybe it's because my skin is much thinner than other people's skin, but it still had an effect, but it returned to its original state after about 3 weeks.. ㅠㅠ I think it would be better to spend more money and go to a place that isn't a factory type. And people with fair skin get bruises. It really shows up a lot and seems to last a long time . I had bruises for over 3 weeks. When I asked why, they said it takes a long time for people with white and thin skin.