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.
Experts say that having dark spots, specifically around the eye area, is one of the telltale signs of skin aging, apart from wrinkles and gray hair. It is no surprise that a lot of people, especially women panic a little bit at the first signs of dark spots around the eyes. What are the Diseases and Medications That Cause Dark Spots? Dark spots can be caused by a number of things. Certain lifestyle choices such as oneâs diet, sleeping patterns and exposure to smoke and pollution contribute to skin imperfections, including dark spots. However, there are certain diseases and medications that do cause dark spots. Post-inflammatory hyperpigmentation is a common cause of dark circles due to acne and allergies. Other diseases that could cause dark spots are the following: melasma and Riehlâs melanosis.