blood in the semen is not a problem unless it is heavy and prolonged over time. it can come and go and be anywhere from bright red to dark old blood to brownish to spotty. it is scary- that is a fact. but it is not a problem that means anything about fertility or cancer. if you are still worried then see a urologist get an exam a psa and a urine check.
i’ve had blood in my sperm for about a month and a half with no discomfort. does this mean ii cannot impregnate my wife?