Dark circles under the eyes are not a social condition. Here are the primary causes for dark circles:
1. Nasal congestion 2. Eyelids swelling during sleep 3. Atopic eczema 4. Genetics (runs in the family, enzyme deficiency) 5. Aging 6. Allergies (Hay Fever, Dust Mite and Mold allergies) 7. Dehydration 8. Stress 9. Sleep disorders