Often trauma from catheter placement, or self instrumentation could lead to urethral trauma and subsequent bleeding. Less commonly, tumors, or abnormal blood vessels
could lead to bleeding. There are other causes of bleeding in the urinary tract, but they do not present as bright red bleeding from the penis. These would include : bladder tumors, kidney tumors, bladder infection, kidney or bladder stones, prostate cancer and prostate vein bleeding among others.