Blood in the semen is known hematospermia. It can have many causes. These include; lesions of the prostate; inflammation and/or lesions of the urethra; lesions of the seminal vesicles.
Treatment for hematospermia should be age dependent, as the condition, could portend GU malignancies (prostate cancer). A urinalysis and culture would be appropriate in determining the presence of a bacterial infection and/or blood in the urine. This would be a starting point in your treatment plan.
Ash Tewari, MD
I too have just now experienced a bit of blood in my semen! It is quite alarming as this is my first time seeing this. I have a relationship with a woman and see her only on weekends, so sometimes Mary-Palmer has to come to the rescue and this was the occassion of which I noticed this. There was no pain associated with this experience other than the strain of the orgasm, which didn't seem painful, just pleasurable...if you understand what I mean. Is this just normal for some men reaching ages over 45?
u have prostatitis just a regular inflammated prostate due to an std infection that was treated late.
A related discussion, Blood in Semen