Originally, I wanted to get contouring injections because I was worried about my double chin, but I was worried about what side effects it would have because the ingredients are different at each hospital, and I was told that the effect would be temporary, so I ended up getting Violet. It is much more expensive than contour injections, but it is said to be semi-permanently effective by killing fat cells, and it seems to have fewer side effects. The thing I was most worried about was that the treatment area swelled immediately after the treatment, resulting in a double chin, but I wasn't worried because it was a severe double chin to begin with! After 4 weeks, I was a little disappointed because there wasn't as dramatic a change as the other review photos, but when I touched it with my hand, it seemed to have definitely decreased compared to before... haha... I'm thinking about getting another shot.