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.
Apart from that, some food allergies can also cause the area under the eyes to appear darker. In fact, dark circles in children often indicate allergy problems. Research also suggests that dark circles are linked to anemia, and liver diseases. Dark circles and anemia - Iron deficiency is one of the most common causes of inexplicable dark circles in many cases, which can be treated by making simple changes in your diet. Low iron levels is the most common form of anemia, and results in poor oxygenation in body tissues due to low supply of oxygenated blood.