This procedure is used as a treatment for a painful condition of the lower abdomen called pelvic congestion syndrome or ovarian vein reflux. Somewhat like what happens with varicose veins, veins in the lower abdomen can become enlarged and cause painful pressure. Using a catheter — a thin tube that is inserted through a small nick in the inner thigh — a radiologist administers agents that block the flow of blood to faulty veins. About 85% of women report pain relief or improvement within 2 to 3 weeks.