Men who ejaculate red blood consider hematospermia, which may be due to inflammatory infections, benign tumors, malignant tumors, vascular anomalies, systemic factors, trauma and so on. 1. Inflammation: most of the hematospermia is related to inflammatory infections, the more common is seminal vesiculitis, which may be non-specific bacterial infections, or gonococcus, Mycobacterium tuberculosis, viruses, chlamydia and mycoplasma, and so on. 2. benign tumors: seminal vesicle adenoma, posterior urethral adenoma, proliferative urethritis, etc. will destroy the tissue mucosa or even rupture, may also occur hematospermia. 3. Malignant tumors: malignant tumors of prostate and seminal vesicles may have rupture and bleeding, causing hematospermia. 4. Vascular abnormality: arteriovenous malformation of prostate and seminal vesicles as well as hemangioma may cause bleeding of blood vessels, resulting in hematospermia. 5. Systemic factors: hypertension, scurvy, hemophilia, and severe liver disease can lead to pressure changes in the seminal vesicle glands and damage to the capillaries of the seminal vesicles, which can also cause hematospermia. 6. Trauma: Violent impacts to the perineum or testicles can lead to blood vessel rupture and hematospermia. Hematospermia is an abnormal manifestation, it is recommended to go to the hospital for a detailed examination to clarify the cause of the disease and treat the symptoms.