I got dark circle filler at a factory before. It didn't work even after I got it, but what was more frustrating was that after about 2 years, the filler moved down and popped out whenever I smiled.
So I got it removed at a place with good reviews through an app (I can't find the hospital in Seongye-sa. It's Lollipop Plastic Surgery).
The doctor and staff were kind and did a thorough job, but I think it was only 30% effective.
It's better than not doing it, but it's a shame. I guess it's because a lot of time has passed.
One thing to be careful of is that hyaluronic acid doesn't exactly dissolve filler.
The area around my eyes really sank and my dark circles got much darker.
Still, I'm satisfied because I got the procedure done at a cheaper price than at other hospitals.