Dark circles, probably around the eyes, I suppose what you mean. They are probably due to lack of sleep
Or eye strain, like working in front of the computer for long hours
Or anaemia, specially iron deficiency
Or some respiratory complaint
Some other health problems can also cause it.
Sometimes, it's due to the wrinkling of the skin below the eyes, as it is very delicate at that region.
Eat well, nutritious food. Vegetables and fruits
Avoid long exposure to tv & computer
Apply some cold compress to the closed eyes. U can apply cut potato or cucumber. Even cotton swab, dipped in cold water may help.
If you feel, u can call me at my clinic. We have treatment for that