Blood in Semen
Blood in the semen, called hematospermia, is blood that is either too small to be seen (microscopic) or visible in the ejaculation fluid.
For men under age 40, infection is the most common cause. Infection is usually accompanied by other signs and symptoms, such as fever, genital or urinary pain, difficulty urinating, or blood in your urine.
For men age 40 and older, blood in semen is a slight predictor of a cancer (malignancy), most often prostate cancer. So a more careful evaluation is merited when this sign appears in this age group. But the risk is low. In follow-up studies of more than 800 men who had blood in their semen, cancer was found in less than 4 percent (on average).
Symptoms that may occur with this condition include:
Blood in urine
Fever or chills
Lower back pain
Pain with bowel movement
Pain with ejaculation
Pain with urination
Swelling in scrotum
Swelling or tenderness in groin area
Tenderness in the scrotum
More common causes of blood in semen:
Prolonged sexual abstinence
Prostate gland enlargement
Vasectomy: An effective form of male birth control
Less common causes:
Benign growths (cysts, polyps) in the bladder, urethra or prostate
Fragile blood vessels
Thrombocytopenia (low platelet count)
Von Willebrand disease
Warfarin side effects: Watch for interactions