I have found some good tips in following link; it may be helpful for you.
Sleep more i guess . I have dark circles xc
Periorbital dark circles also known as dark circles are dark blemishes around the eyes. There are many causes of this symptom, including heredity and bruising. Concealer is the most effective tool for hiding dark under-eye circle.
It's dark circles around your eyes or dark make up made to look like a raccoon
Almond oil, cucumbers, and raw potatoes are three popular home remedies for getting rid of dark circles around the eyes. Lemon juice is another popular option.
it's just eyeliner to keep out the sand.
Periorbital dark circles , (also dark circles or raccoon attack).
Their white and red blood cell drops causing anemia. No blood circulates around cells around the eyes?
Vitamin deficiencies, including vitamin B12, D, E and K, have been associated with dark circles.
No they don't they just hide them. Dark circles are caused from sleep deprivation
It is not true !
To remove dark circles around the eyes in GIMP, first, open your image and select the "Healing Tool" from the toolbox. Zoom in on the area with dark circles, then gently brush over the circles to blend them with the surrounding skin. You can adjust the brush size and opacity for more precise control. Finally, use the "Clone Tool" if needed for additional touch-ups and to ensure a natural look.
concealer works best or a full coverage foundation. Also you can get a rollerball at drugstore that reduces the darkness of dark circles.