Sounds like "allergy eyes". One day I was visiting my doctor and took my daughter with me. She was about 4 years old at the time. My doctor took one look at her (even though I was the patient) and he said to me -- your daughter has allergies. I told him that I had been concerned that she did have allergies, but what made him aware of that. He said she had allergy eyes. The funny thing is that I always had dark circles under my eyes, even as a young child. My teachers would send home notes to my parents to make sure I got sufficient sleep. Now I know - my parents didn't have a clue at the time - that I had allergies then and now. When my sinuses get infected or I have a cold, my dark circles get worse. Same for my daughter.