Blood in semen: what it is and how it manifests itself

Hematospermia is the appearance of blood in the ejaculate (visible pink/red color, "strings" of blood, or clots). While this symptom often appears alarming, it is generally benign and self-limited, especially in men under 40 with no other complaints. Even with a thorough examination, the exact cause is often not found, and severe pathology is rare. [1]

The source of blood is usually the vas deferens: the seminal vesicles, prostate gland, ejaculatory ducts, and, less commonly, the urethra or epididymis. Trauma, inflammation, vas deferens stones, benign prostatic hyperplasia, clotting disorders, and hypertension are typical triggers. It is important to distinguish hematospermia from hematuria (blood in the urine): these conditions require different diagnostic approaches. [2]

Current guidelines recommend risk stratification by age and clinical course. For men <40 years of age with a single episode and no "red flags," observation is sufficient. For men ≥40 years of age, with persistent/recurrent symptoms, associated hematorrhea, pain, fever, or risk factors, further evaluation is indicated (tests, uro-/andrological examination, and, if necessary, imaging). [3]

Code according to ICD-10 and ICD-11

There is no separate code for "hematospermia" in the ICD; symptomatic and etiologic categories are used. In ICD-10, R36.1 "Hematospermia" is used for the symptom (in some localizations it is included in R36 "Urethral discharge"); if the cause is established, the underlying disease is coded: N41.* (prostatitis), N43.* (hydrocele/spermatocele), N42.3 (prostatic calculus), A54.* (gonococcal infection), C61 (prostate cancer), etc. [4]

ICD-11 uses post-coordination: "MB21.1Z-Abnormal ejaculation, unspecified" as a symptom (or QC42.2-Haematospermia in clinical extensions, where available), followed by clarifications on the underlying cause (e.g., GB20.0 "Acute prostatitis," 2C82 "Prostate carcinoma"). This approach better reflects the clinical picture: first the symptom, then the confirmed etiology.

Table 1. How typical scenarios are coded

Clinical situation	ICD-10	ICD-11
Isolated hematospermia (symptom)	R36.1	MB21.1Z / QC42.2 (where available)
Acute prostatitis	N41.0	GB20.0
Prostate/seminal vesicle stones	N42.3	GB20.Y / post-coordination
Ejaculatory duct cyst/obstruction	N50.8 / N50.9	MA20.Y / post-coordination
Suspected prostate cancer	C61 (after verification)	2C82

Epidemiology

Hematospermia is less common than expected because many cases go undetected. In urology registries, it is the reason for consultation in approximately 1 in 5,000 visits; in most series in men <40 years of age, the course is benign, and in >70% of cases, the etiology remains unknown even after investigation. [5]

The risk of detecting significant pathology increases with age ≥40 years, persistent or recurrent episodes, concomitant hematuria, the presence of general symptoms (pain, fever, weight loss), and a family history of prostate cancer. These groups are referred for advanced diagnostics and, if necessary, imaging. [6]

Reasons

Inflammatory/infectious processes are the most common: prostatitis, vesiculitis, urethritis, and epididymo-orchitis. These cause fragility of the mucosal vessels, swelling, and microdamage to the ducts, which discolors the ejaculate. Associated symptoms (dysuria, pelvic pain) are often present. [7]

Mechanical causes: trauma (including after active sex/masturbation), prostate biopsy and other interventions, prostate or seminal vesicle stones, prostate utricle/ejaculatory duct cysts, obstruction. These conditions are most often detected by transrectal ultrasound (TRUS) and/or MRI. [8]

Less common are systemic factors: coagulation disorders, anticoagulants/antiplatelet agents, severe hypertension, liver disease. Oncopathology (prostate cancer, less commonly seminal vesicle cancer) is a rare cause, but it is taken into account in older patients and in cases of "red flags." [9]

Risk factors

Age ≥40 years, persistent/recurrent course, concomitant hematuria, significant trumous or infectious episodes, anticoagulant therapy, family history of prostate cancer - all this increases the likelihood of a significant finding and determines the “low/medium/high” risk and depth of examination. [10]

Table 2. Who is at increased risk (and why)

Factor	Why is it important?	What changes in tactics?
≥40 years	The probability of an organic cause is higher	The visualization threshold is below
Recurrence/persistence	The chances of it going away on its own are lower.	Advanced tests + ultrasound/MRI
Hematuria, pain, fever	Prostatitis/vesiculitis/tumor is possible	Urgent in-person assessment
Anticoagulants/coagulopathy	Systemic source of bleeding	Correction of therapy/coagulogram

Pathogenesis

Blood enters the ejaculate due to micro-tears in the vessels of the mucosa and vas deferens. Inflammation increases blood flow and vascular fragility; stones and cysts scratch the mucosa; and a sudden increase in pressure (including hypertension) promotes blood extravasation. The volume is usually small, so the blood mixes with the semen and changes its color. [11]

If the source is located proximally (seminal vesicles, ejaculatory ducts), the ejaculate is often dark brown ("older" blood). If the source is distal (urethra), bright red streaks appear on the final portion. These observations are helpful but do not replace an examination. [12]

Symptoms

The main symptom is visible blood in the semen: from a slight pink tint to a pronounced red color, sometimes with clots. It is often accompanied by dysuria, a nagging pain above the pubis/in the perineum, pain during ejaculation, and symptoms of prostatitis or vesiculitis. [13]

Red flags: fever, severe/persistent scrotal or perineal pain, blood in the urine, significant weight loss, age ≥40-45 years, symptom recurrence, immunodeficiency, or anticoagulant therapy. These signs require prompt in-person evaluation. [14]

Forms and flow

A distinction is made between isolated (single) hematospermia and recurrent/persistent. The former is often benign and does not require active diagnostics in young patients. Recurrences, especially in the presence of "flags," place the patient in a "medium/high risk" situation, necessitating imaging. [15]

According to the source: inflammatory, mechanical (stones, cysts, strictures), vascular, iatrogenic (post-procedure), and systemic (coagulopathy, hypertension). Clarifying the variant simplifies the choice of therapy. [16]

Complications and consequences

The symptom itself is rarely dangerous, but it can be a marker of inflammation, obstruction, or (rarely) a tumor. Delaying treatment for fever and pain can lead to abscess, epididymo-orchitis, or spread of infection. Duct stones can lead to increased pain and ejaculatory/fertility issues. [17]

The psychological aspect is significant anxiety for the patient and partner. A correct explanation of the benign nature of most episodes and a clear plan of action are an important part of care. [18]

When to see a doctor

• Immediately, if present: fever, chills, severe pain, blood in urine, severe weakness, recent trauma to the scrotum/perineum.
• In the next few days, if blood in the semen recurs, if you are ≥40 years old, have dysuria, pain during ejaculation, have a family history of prostate cancer, or are taking anticoagulants.
• Planned, if there was a single episode in a young person without complaints and everything went away: it is enough to discuss the situation with the doctor and get instructions on when to return. [19]

Diagnostics (popular science)

1) History taking and examination. The doctor will determine the duration/frequency of episodes, associated symptoms, sexually transmitted and urogenital infections, procedures (prostate biopsy), medications (anticoagulants), and blood pressure measurements (it is important to rule out uncontrolled hypertension). The examination includes the prostate gland (PRI), scrotum, and urethra. [20]

2) Basic tests. General urinalysis (to rule out hematuria/infection), urine and/or ejaculate culture if there are symptoms of infection, PSA as indicated (usually ≥40 years or with "flags"), coagulogram if taking anticoagulants/bleeding. In case of scrotal pain - ultrasound of the scrotum. [21]

3) Visualization if necessary (according to ACR 2025).

• <40 years, single episode without symptoms - imaging is not needed.
• ≥40 years or recurrence/persistence, or "flags" at any age - TRUS as first line; if uninformative or doubts remain - MRI of the pelvis to assess the seminal vesicles/ejaculatory ducts/prostate. CT is used rarely, for special indications. [22]

4) Additional methods. If obstruction is suspected, MR urethrography/MRI; in cases of severe relapses and negative visualization, seminal vesicle endoscopy will be considered (see treatment). [23]

Table 3. What to look for in visualization (simplified)

Method	What we see most often	Why is this necessary?
TRUSI	Utricular/seminal vesicle cysts, stones, signs of vesiculitis/prostatitis	First line in "difficult" cases
MRI of the pelvis	Subtle details of ducts/seminal vesicles, hidden stones/cysts, tumor	If TRUS is negative/unclear
Ultrasound of the scrotum	Epididymo-orchitis, cysts/varicocele	If there is pain in the scrotum
Tests (PSA, urine, coagulation.)	Rule out infection/onco/coagulopathy	Clarifies the route

Differential diagnostics (popular science)

• Hematuria (blood in the urine): pink/red urine outside of ejaculation, often not associated with orgasm - requires its own algorithm (microscopy, cystoscopy if indicated).
• Bloody discharge from the urethra outside of ejaculation ( urethritis, trauma).
• Blood in the ejaculate after procedures (prostate biopsy, vasectomy) is expected and goes away.
• Oncologic processes: rare, but taken into account in older patients and in “flags”. [24]

Table 4. "Similar - not similar"

Sign	Hematospermia	Hematuria
When blood is visible	During/immediately after ejaculation	When urinating
Semen/urine color	Sperm is pink/brownish	Pink/red/meat-like urine
Pain during ejaculation	Often	Not necessarily
Examination route	Urologist + TRUS/MRI if indicated	Hematuria protocol

Treatment (in detail, including modern approaches)

1) Low risk (men <40 years old, single episode, no “flags”).

• Tell them and reassure them: most often it is safe and will pass.
• Exclude obvious infection; in the presence of urethritis/prostatitis - targeted therapy by culture/PCR.
• Observation 1-3 months; relapse is a reason to move to the next stage. [25]

2) Suspected infection/inflammation.

• Antibacterial therapy according to local recommendations and sensitivity (eg, for prostatitis/vesiculitis), NSAIDs, rest, hydration.
• For STIs - etiotropic regimen + partner treatment.
• Symptom control; in case of relapse - visualization. [26]

3) Mechanical causes (stones, cysts, obstruction).

• TRUS-guided approach: if seminal vesicle/ejaculatory duct stones, significant cysts, or cicatricial changes are detected, endoscopic seminal vesicle surgery (transurethral seminal vesicle endoscopy/transutricular vesiculoscopy) is indicated. This method is effective in cases of persistent hematospermia associated with stones/cysts or obstruction. [27]

4) Coagulopathies/anticoagulants/hypertension.

• Adjust anticoagulant doses (in consultation with the supervising physician), manage hypertension, and treat underlying coagulation disorders. Discontinuing the anticoagulant alone often won't solve the problem, but it is part of a comprehensive plan. [28]

5) When an onco-route is needed.

• Age ≥40-45 years, persistence/recurrence, abnormal PSA/PRI, suspicious lesions on MRI – indication for targeted prostate biopsy according to modern protocols. Further treatment according to oncological urological standards. [29]

Table 5. Therapy "ladder"

Situation	The first step	If it didn't help
A single episode in a young man	Explanation + observation	Diagnosis in case of relapse
Symptoms of infection	Cultures/PCR → antibiotic, NSAID	Imaging (TRUS → MRI)
Duct stones/cysts	TRUS/MRI verification	Endoscopic vesiculoscopy
Anticoagulants/BP↑	Correction of therapy	Co-management with a therapist
Suspected tumor	MRI of the prostate, PSA	Biopsy and oncologic route

Prevention

There is no specific prevention, but general measures can help: treatment and prevention of urogenital infections, reasonable sexual activity (avoiding "traumatic" practices), blood pressure control, and caution with anticoagulants (strictly as indicated). After invasive prostate procedures, hematospermia is expected and usually resolves within a few weeks. [30]

Forecast

In the vast majority of cases, the prognosis is favorable: the episode is short-lived, and no dangerous causes are found. If a cause is identified (inflammation, stones, cysts), etiotropic treatment effectively reduces recurrence. In a small percentage of older patients, hematospermia can be a marker of prostate pathology, so timely diagnosis using an algorithm is especially important for these patients. [31]

FAQ

1) Is it always dangerous?
No. In young people without other complaints, it's almost always benign and resolves on its own. You should see a doctor if there are recurrences, "flags," or if you're over 40 years old. [32]

2) Does everyone need imaging?
No. According to ACR 2025, imaging is not indicated for patients under 40 years of age and with a single asymptomatic episode. However, for patients ≥40 years of age, with recurrences or "flags," TRUS is recommended first, and if the diagnosis is unclear, MRI is recommended. [33]

3) Could this be prostate cancer? It's
rare, but in men over 40-45 years old and with warning signs (PSA, DRI, MRI ± biopsy), it's ruled out. [34]

4) Do antibiotics help "just in case"?
Not recommended. Antibiotics are prescribed as indicated (if there are signs of infection/positive tests). Otherwise, resistance and the risk of side effects increase. [35]

5) What is seminal vesicle endoscopy and when is it needed?
This is an endoscopic procedure performed through the urethra to access the seminal vesicles/ejaculatory ducts. It is used for persistent hematospermia associated with stones/cysts/obstruction and has shown high efficacy. [36]

Table 6. "Traffic light" of symptoms

Situation	What to do
A one-off episode, you're under 40, nothing else bothers you.	Observe calmly; if it recurs, consult a urologist.
Recurrences, you are ≥40, have pain/dysuria	Make an appointment with a urologist: tests, transrectal ultrasound (± MRI)
Fever/severe pain/blood in urine	Urgent in-person care (emergency care)

Table 7. ACR 2025 Summary Algorithm (Simplified for the Patient)

Profile	Is visualization necessary?	What exactly
<40 years, transient episode, asymptomatic	No	Recommendations and observations
≥40 years OR persistent/recurrent	Yes	TRUS → if pelvic MRI is unclear
Any age + "red flags"	Yes, with priority	Depending on the situation: TRUS/MRI, tests