Is there a good treatment for dark circles under the eyes?

My under-eye area has always looked dark and dull, but recently it seems to be becoming even more noticeable, so I am concerned. On top of that, it seems like fat has clumped up under my eyes, making it stand out even more.

I am wondering if this is simply due to my skin darkening, or if it appears more prominent because of accompanying factors such as under-eye fat, hollowness, or visible blood vessels. I am particularly stressed because I often hear that my dark circles look worse and I look tired depending on the lighting or my condition.

Even when I try to cover it up with makeup, it is difficult to completely conceal, and it looks dark again over time, so I would like to find a way to improve it fundamentally. Since the skin under my eyes is on the thinner side, I am also worried that if I undergo a procedure, side effects, bruising, or swelling might last a long time.

I would like to consult on which method is most suitable for dark circles, such as laser treatments, injections, or under-eye fat repositioning. If possible, what procedures can naturally improve the condition and brighten my complexion?