 [ Symptoms ] can whooping cough be severe [ Disease ] blood in the semen is often seen by urologists because the male genital tract is so vascular rich in blood supply there may be many different reasons why you would see a small amount of blood the problem could be distal the penis area or the prostate less commonly it could be an infection in the epididymis the sperm collecting area while cancer is always a less common possibility this is something that your urologist will carefully rule out