An intravenous pyelogram may be used to diagnose disorders that affect the urinary tract, such as kidney stones, bladder stones, enlarged prostate, kidney cysts or urinary tract tumors. During an intravenous pyelogram, you'll have an X-ray dye (iodine contrast solution) injected into a vein in your arm. The dye flows into your kidneys, ureters and bladder, outlining each of these structures.
By Mayo Clinic Staff. Here are some of the most common causes of true under-eye circles. 1  Allergies. 2  Atopic dermatitis (eczema) 3  Contact dermatitis. 4  Fatigue.  Heredity â dark under-eye circles can run in families.
Nasal Congestion and Allergies. The most common cause of dark, bluish circles under the eyes of children is sinus congestion, reports Barton D. Schmitt, M.D., at Parents. Inflammation and congestion in the nasal passage cause the veins around the child's eyes to enlarge and become darker, creating the dark tinge under the eyes.