When the organism semen within the presence of blood is: first, seminal vesiculitis, because the male seminal vesicle glands after inflammation will appear edema, congestion, due to the ejaculation process will lead to the seminal vesicle glands violent contraction and there is bleeding phenomenon, the blood is mixed in the semen, the semen shows bright red, light red, pink and accompanied by blood clots. Promptly go to the hospital urology department for routine semen examination, if the semen suggests that red blood cells, white blood cells are significantly elevated, by taking antibiotic drugs can be treated. Second, blood within the sperm may also be caused by inflammation of the prostate gland, most of the semen is prostate fluid, you can pass the routine examination of prostate fluid, if the prostate fluid in the red blood cells are significantly elevated, consider that the blood in the semen originates from the prostate gland. Third, genitourinary system tumor caused by blood in semen, timely medical treatment, identify the cause of the disease under the guidance of the doctor for further treatment.