I had what felt like blockage in my urethra (maybe 1/2-inch from penis tip) this morning while attempting to urinate. Stream did not start at first, but I felt a painful pressure buildup (where painful = I think I m about to rupture my urethra! ), then stream started suddenly, as though blockage had cleared. Urine looked and smelled normal, but a couple drops of dilute blood emerged immediately afterward. Minor internal stinging (same ~1/2 inch in from tip) off and on since, especially when urinating--feels like the urethral equivalent of a scratched-up throat. I have experienced similar single drop of dilute blood symptom after each urination throughout the day; each time the amount of blood is less. No further difficulty beginning urination. No sign of pus or other discharge. What should I do?