I got it done at a plastic surgery clinic near Gangnam Station. My cheeks were so chubby, so I got it done with deep-bowel injections . They said it didn't hurt more than botox, but I got them done a lot more often, so maybe because they did it multiple times, it hurt a bit!! They said it would swell for 2-3 days, and it was as swollen as a squirrel biting an acorn ㅜㅜ And it stings when I touch it, so it hurts. I'll write again when it's effective!!!