What is the reason for blood in semen during sexual activity?

Patient's question:

Erection of the penis and urination during intercourse, with fresh blood in the semen during ejaculation

Doctor's answer:

Hello, the symptoms of hematospermia are often caused by inflammation of the seminal vesicles and prostate, such as tuberculosis, filariasis, stones, and injury, with seminal vesiculitis being the most common; some tumors, such as seminal vesicle cancer, prostate cancer, papillary tumor of the verumontanum, and benign prostatic hyperplasia, can also cause hematospermia. Varicocele and some hematologic diseases may also lead to hematospermia. It is recommended that you actively go to the hospital for a detailed examination to identify the cause and receive targeted treatment.