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.
Best Answer: Common Causes of Dark Circles Under Eyes. Thinning skin. The skin under the eyes is thin and delicate to begin with. As we age, skin and the fat pad under the eyes becomes thinner, causing blood vessels to become noticeable. This gives the appearance of dark circles. Sun damage can make it worse because it weakens skin.