Causes of dark circles are variable ;
Genetics, lack of sleep, stess, low hb, rubbing, allergy to cosmetics, fragrances, chronic illness, smoking , excessive sunexposure, dryness,
diabetes , insulin resistance and age related or anatomical hollowness creating shawdowing and sunken eyes/ darkening effect
Need to rule out the cause and guide appropriate undereye regime as per your skin type
Next Steps
consult for guidance further