Concern: What is the cause of dark circles?

Since when, a dark shadow has started to cast under my eyes. People I know keep asking me if I'm feeling unwell...

So I also consulted with a dermatologist, but they said they couldn't guarantee results with just laser treatment.

Since there are many types of Winni, it is not easy to eliminate them with laser treatment alone. The question "Where does it hurt?" is asked.

I receive it. It doesn't come off even with makeup, so I'm really worried. What could Winny be? Is there another illness? That's why I'm concerned.

Please tell me how to get rid of dark circles.