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What causes blood in semen (hematospermia)?

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Infection and inflammation are the most common cause of blood in the semen. Blood can come from an infection or inflammation in any of the glands, tubes, or ducts that produce and move semen from the body. These include:

  • Prostate(the gland that produces the fluid part of semen)
  • Urethra (the tube that carries urine and semen from the penis)
  • Epididymis and vas deferens (tiny tube-like structures where sperm mature before ejaculation)
  • Seminal vesicles (which add more fluid to the semen)

From: Blood in Semen (Hematospermia) WebMD Medical Reference

SOURCES:

American Academy of Family Physicians: "Evaluation and Treatment of Hematospermia."

Harvard Medical School: “Prostate Knowledge: Hematospermia Demystified."

Leocadio, D.E. , 2009. International Urology and Nephrology

UCLA Department of Medicine: "Hematospermia."

American Urological Association: "Management of Spontaneous Prostrate Related Bleeding."

National Cancer Institute: "Cancer Stat Facts: Prostate Cancer."

Reviewed by Jennifer Robinson on August 12, 2019

SOURCES:

American Academy of Family Physicians: "Evaluation and Treatment of Hematospermia."

Harvard Medical School: “Prostate Knowledge: Hematospermia Demystified."

Leocadio, D.E. , 2009. International Urology and Nephrology

UCLA Department of Medicine: "Hematospermia."

American Urological Association: "Management of Spontaneous Prostrate Related Bleeding."

National Cancer Institute: "Cancer Stat Facts: Prostate Cancer."

Reviewed by Jennifer Robinson on August 12, 2019

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How can blood in semen (hematospermia) come from a sexually transmitted infection (STI)?

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