The presence of blood in the semen is called hematosperm. When the amount of blood is high, it is red and even has blood clots. When the amount of blood is small it shows some blood streaks, and in others only red blood cells are found under the microscope. Hemosperm can persist in several consecutive ejaculations, with fresh bleeding being bright red and old ones being brown. Clinically, hematosperm is not uncommon, and many people are very nervous after the appearance of hematosperm and do not know what is going on, which also causes adverse psychological effects to the spouse. Mild hematosperm may not affect the quality of semen, but severe hematosperm can affect the physicochemical properties of semen and the movement of sperm, especially infected hematosperm can seriously affect the quality of semen. The following are some of the reasons why hematosperm occurs. First of all, we have to exclude the case of hematosperm caused by components other than semen, such as pigment contamination (condoms, underwear, bed sheets, etc.), female vaginal bleeding, and mixing with one’s own blood and urine. I. Functional causes: such as excessive masturbation, excessive sexual life or abstinence, excessive interruption of sexual intercourse. Sudden hematospermia: may be caused by minor damage to the seminal tract. III, organic causes: 1, anatomical abnormalities: such as Mullerian duct cysts, ejaculatory ducts, ectopic opening of the vas deferens. 2, stones: prostate stones are very common, as well as stones in the ejaculatory duct or seminal vesicle gland may cause hematospermia. 3, infection: it is generally believed that this is a common cause of hematospermia, and the organs involved are the urethra, prostate, seminal vesicles and epididymis. A few should consider the presence of tuberculosis, parasites, etc. 4.Tumor: There can be benign or malignant tumor, and the organs involved can be testes, seminal vesicles, prostate, ejaculatory duct, urethra, etc. 5, traumatic factors: such as testicular and perineal trauma, prostate puncture or after surgery. 6, amyloidosis of the seminal vesicle gland and cirrhosis of the liver, etc. After the appearance of hematospermia, we should also assess the systemic coagulation function, the presence of coagulation disorders, blood diseases, etc. We should also pay attention to the application of blood-activating drugs such as aspirin, Poliovel, warfarin, etc. The first step in treatment is to identify the cause of hematospermia, and after finding the cause, to provide targeted treatment for the cause. If it is functional or sudden, no special treatment may be required, and the need for appropriate application of antibiotics and hemostatic drugs will be decided according to the situation. In case of persistent hematospermia, vesiculoscopy and treatment are feasible if the cause is not clear.