After dieting, my under-eye hollowness got worse, so I got a small amount of filler to fill in the dark circles and the hollow feeling under my eyes. I heard that it is best to use imported filler with thin particles and good absorption for the under-eye area, so I got 1cc of Belotero. I asked them to fill in only the hollow areas naturally, since you can't put much under the eyes anyway!! I think I used a lot of force without realizing it because it hurt a bit when I got the filler. It was bruised rather than swollen, and I think it lasted for about 10 days. It's been about a month now, and I'm satisfied because only the hollow areas were filled in well, without the under-eye area bulging out more or anything.