The beauty queen -- who won her crown in 1997 -- recounted her ordeal on the 'Secret Garden' talk show when she spoke about her efforts to lose weight after she weighed more than 70 kilograms, or 154 pounds, reported Korea JoongAng Daily.
"I was sedated with anesthetics, but I still felt aching pain in my thighs, and I just got up shouting that it hurts too much," she said, not knowing then that she was in a clinic with no legal license to proceed with such a surgical procedure.
She also spoke on how she was desperate to lose weight after the excess kilos were putting pressure on her mental well-being.
"I was so stressed from being overweight; there were no diet measures I didn't try."
In the end, she decided to get liposuction after failing to lose weight from trying many different weight-watching programs.
She said she was the skinniest condition in her life when she was competing in the beauty pageant.
"After that, I was never under 60 kilograms until recently, as I now weigh [little less than 60]," she said.