I did it in a hurry because I had an event in Busan, but I think I did it for no reason. There is no big difference, but my cheeks are saggy, my jaw feels bad, and the bone in the middle of my front jaw gets cold every now and then. I hear a crackling sound in both my jaws, and I will never do it again if I go back. I'm so worried that it might cause a big problem as I get older. ..