What does it mean when there is blood in the semen?

Sep 26, 2021 Source: Cainiu Health
Dr. Zhu Bo
Introduction
A possible diagnosis is seminal vesiculitis. Clinically, the condition primarily presents with semen appearing pink, red, brownish-red, or streaked with blood. Semen composition consists of only a small volume of spermatozoa; approximately 60% originates from the seminal vesicles and 40% from the prostate. However, the prostate gland is firm and relatively resistant to bleeding, whereas the wall of the seminal vesicle is very thin—making it highly susceptible to hemorrhage when inflamed and congested.

Normal male semen is milky white and viscous. Abnormal semen can impair male fertility. Therefore, men who notice abnormalities in their ejaculate should seek medical evaluation at a hospital. So, what does it mean when blood appears in semen? Below, we address this question.

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What Causes Blood in Semen?

Blood in semen—also known as hematospermia—may indicate seminal vesiculitis. Clinically, affected individuals often present with pink, red, brownish-red, or blood-streaked semen. Semen composition includes only a small volume of spermatozoa; approximately 60% originates from the seminal vesicles and 40% from the prostate gland. While the prostate gland is relatively firm and less prone to bleeding, the walls of the seminal vesicles are thin and highly vascularized; thus, inflammation-induced congestion readily leads to hemorrhage. Chronic seminal vesiculitis tends to recur and may lead to complications such as erectile dysfunction and anejaculation, often accompanied by associated psychological symptoms. Fortunately, the prognosis is generally favorable, and most cases respond well to timely and appropriate treatment.

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Knowledge Extension: How Is Seminal Vesiculitis Treated?

1. Pharmacological Treatment

For acute seminal vesiculitis, antibiotics should be continued for 1–2 weeks after all symptoms have completely resolved to ensure eradication of infection. In chronic cases, treatment typically extends for at least four weeks to consolidate therapeutic efficacy. If bacterial infection is confirmed, targeted antibiotic therapy is essential to eliminate the causative organisms. Severe cases—for example, those complicated by urethral obstruction—may require hospitalization and intensive management.

2. Surgical Treatment

Surgery involves making a small incision in the scrotum. The surgeon carefully dissects and separates the cyst from the testis and epididymis before complete excision. It is critical that the procedure be performed by an experienced clinician to avoid compromising testicular blood supply or disrupting the anatomical continuity of the epididymis and vas deferens.

The above outlines the potential causes and management of hematospermia. We hope this information is helpful to you.

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