Bleeding from semen discharge, blood in the urine, and blood in the urine even with erection may be due to seminal vesiculitis, and may also be a symptom caused by prostate cancer. Once appeared should immediately go to the hospital for consultation, avoid self medication. 1. Vesiculitis is a common urinary system disease, mainly due to retrograde infection, symptoms include perineal pain, urinary urgency, frequent urination, painful urination, pain during ejaculation and so on. Meanwhile the semen can be pink or red in color during ejaculation. General treatment includes timely bed rest, abstaining from sexual intercourse during the acute period, and taking some antibiotics. 2. Prostate cancer is often asymptomatic in early stage, but when the mass increases in size and obstructs the urethra, it can cause frequent urination, urgency, interruption of urinary flow, incomplete urination, etc. If prostate cancer is suspected, it should be treated with antibiotics and other antibiotics. If prostate cancer is suspected, you should go to the hospital immediately for treatment. Examination includes ultrasound examination of seminal vesicles and prostate as well as index examination of prostate cancer. If symptoms such as bleeding from seminal emission occur, you should go to the hospital immediately for consultation and treatment, and standardize the treatment under the guidance of the doctor.