dark circles can be caused due to ....lack of sleep, excessive stress, inadequate  intake of water, not taking balanced diet ........ hence correct your lifestyle , have a good sleep, stay hydrated, avoid prolonged exposure to direct light and also reduce the eye strain as much as possible . apply mixture  of orange juice and turmeric and give a light massage around the eyes for 5 mins ... twice a a day once in the morning before bath and then add bed time ..do not use soap just rinse it with normal water .