For a long time, beginning in my childhood, I had dark ciricles under my eyes. My mother was always convinced that it was because I didn’t eat enough vegetables. I later discovered that it was because I have allergies, so perhaps you have developed some sort of allergy to something. As a side note, the whole “you’re not eating enough vegetables” -thing never made sense to me. There were entire tribes of American Indians who never ate any vegetables, had almost a strictly carnivorous diet, but were noted for their strong stature and beautiful skin. I also believe that it’s in contemporary Iceland or Greenland where they eat very few vegetables or fruit, but are known for their longevity.