Rigid Line on Penis

Q. I have noticed a rigid line that runs from my pelvic area down my penis ending below the head with a bump or small knot. It has a dull pain most of the time. Should I be concerned?

A. Yes, you should be concerned. In fact, from the information you have provided, it sounds as if you may have thrombophlebitis in a vein on the penis. Thrombophlebitis is a term used to describe a vein with a blood clot in it. The clot can be a sign of infection in the vessel, which may make it red and cause pain.