Educational information only, not a diagnosis. Know when to get help.
On this page
Pain when you ejaculate alongside blood in your semen is a reason to see a clinician. Mayo Clinic lists pain with urination or ejaculation among the reasons to call [Mayo Clinic].
Likely causes
- Prostatitis, inflammation of the prostate, often from infection. Pain when ejaculating is a listed symptom [NHS]. See prostatitis.
- Epididymitis or orchitis, inflammation of the tube behind the testicle or the testicle itself, often from an STI in younger men or a urine infection in older men [NHS].
- STIs such as chlamydia and gonorrhea [NHS].
- Seminal vesicle stones or cysts, less commonly [review].
When it's urgent
Fever or shivering with pain, inability to pass urine, or sudden severe testicle pain need same-day care [NHS].
What helps
Treatment depends on the cause: antibiotics for bacterial infection, and pain relief such as paracetamol or ibuprofen as advised by the NHS for prostatitis [NHS].
Sources
- Blood in semen: when to see a doctor Mayo Clinic
- Prostatitis NHS, reviewed Feb 2024
- Epididymitis NHS
- Sexually transmitted infections (STIs) NHS
- Etiologic classification, evaluation, and management of hematospermia Translational Andrology and Urology review, PubMed Central (PMC5673809)
We link to primary medical sources so you can check our work. See the editorial policy and the full reference list.