Hi, Genetics is quite an important factor in dark circles. In such cases, it usually leads to darkening of areas around the eyes and of the upper lid too. Also, our periocular skin thickness, certain allergies, vascular flow can be genetically determined. If the skin is too thin and vascular flow sluggish, it could present as increased pigmentation. Similarly, certain allergies can lead to frequent itching around eyes which can cause increased pigmentation. Also, our facial contour can be genetically determined and can lead to a tear trough under eye Usually such pigmentation increases with stress, illness, visual strain, lack of sleep, ill nutrition, smoking, alcohol and sun exposure. In your case, these suggestions might be useful 1) Lifestyle modification, take adequate rest, have at least an 8-hour sleep. Take a nutritious diet and maintain adequate hydration. If in case your haemoglobin is low, take iron supplements. Avoid too much of visual strain, Avoid caffeinated beverages, alcohol etc. Avoid stress, go for regular walks. Hope I have answered your query. Let me know if I can assist you further. Take care Regards, Dr Ivan R. Rommstein, General Surgeon