Pigmentation around the eyes may be due to excess melanin in the skin, shadowing effect due to deep set eyes or due to thin skin around the eyes. Pigmentation around the eyes may be due to excess eye muscle strain, inadequate sleep, iron or vitamin B12 deficiencies, thyroid hormonal imbalance or constitutional. Dark circles may extend on to the cheeks leading to pigmentary demarcation lines.  However if it is only on one side any trauma or underlying ophthalmologic cause should be ruled out with an Ophthalmologist’s opinion apart from a Dermatologist’s consultation. Topical cream/serum containing vitamin C, retinol, haloxyl, kojic acid , glycolic acid, etc in lower concentrations are recommended. Sunscreens, using sun glasses, anti glare screens on desktop/laptop etc may prevent further worsening of the condition. Laser toning with Q-switched yag laser, mild chemical peels may help. If the cause of dark circles is due to hollowness under the eye, hyaluronic acid fillers may help. For more help please visit dermatologist near you