Hemospermia is one of the diseases of the male reproductive system. Hemospermia is a disease in which blood is mixed in the semen. Depending on the amount of blood contained, it may appear as naked-eye hematosperm, clots containing blood, or only a small amount of red blood cells under the microscope to determine the nature and severity of the lesion. Red semen ejaculated during sexual intercourse is mostly seen in modern medicine as seminal vesiculitis, which is less common clinically. The disease is often complicated by prostatitis, and the route of infection is mostly direct spread of urethral and prostate infection; followed by lymphatic and bloodstream infections. As a result of bacterial invasion and inflammatory stimulation, the seminal vesicles become engorged with blood, and when sexual intercourse occurs, the smooth muscle and blood vessels contract, resulting in a large number of red blood cells and pus cells in the seminal fluid. Generally speaking, hematosperm is not easy to be noticed immediately, unless there is a lot of bleeding, otherwise it is more difficult to be found during sexual intercourse. Even if the penis and clothing are found to be bloodstained after sexual intercourse, people tend to first think that it is the woman’s fault. If you wear a condom during intercourse or ejaculate outside the body, it is not difficult to find bloody semen. When people suddenly find that the color of semen has changed, they are nervous and often wonder what is going on. When semen suddenly changes from its normal milky white color to blood red, reddish brown or mixed with blood, of course blood has been mixed in. So where does the blood come from? It could be a lesion in one of the tissue areas of the sperm pathway, such as bleeding, inflammation, or even a tumor. Don’t take hematemesis lightly, it can also be a sign of a serious disease, and it’s best to see a specialist for a serious examination. Clinically, hematospermia is not uncommon, and after detailed clinical and laboratory examinations, most of them can be controlled or cured with treatment, while only a very small number of tumor patients need further treatment. Since semen is composed of components other than spermatozoa of very small volume, it mainly comes from the seminal vesicle gland, followed by the prostate gland. Anatomically, the ejaculatory duct connecting the seminal vesicle gland opens at the urethral crest of the posterior urethra and is surrounded by 10-20 prostatic glandular openings. In fact, the seminal vesicle gland, prostate gland and posterior urethra are in communication with each other and inflammation can easily spread from one of them to the other two. In addition, the wall of the seminal vesicle gland is very thin, and once it is congested, the vascularized vesicle wall can bleed easily. Therefore, the most common cause of hematospermia is firstly vesicourethritis, followed by prostatitis and posterior urethritis or posterior urethral congestion. Inflammation, swelling, congestion and bleeding of the wall of the seminal vesicle gland can also be caused by the spread of inflammation in other adjacent organs. Generally, at least 70% of hematospermia under the age of 30 is caused by inflammation. The treatment principles for hematospermia are basically the same (except for tumors and tuberculosis, which require special treatment), the main thing is to abstain from intercourse during acute bleeding, and rest for 1-2 weeks after the hematospermia disappears, and sexual intercourse should not be too frequent and intense after recovery; abstain from alcohol and spicy and stimulating food to avoid aggravating the degree of congestion; do not ride bicycles or horses for long distances; massage of the prostate gland of the seminal vesicles once a week helps to discharge inflammatory secretions; hot water Sitting bath once a day, 15-20 minutes each time, water temperature 41-42°C (30 days a course, rest 10 days before the next course); if necessary, seminal vesicle microscopy for clear diagnosis and treatment. As long as the treatment is proper, it will not affect intercourse and fertility after healing, so there is no need to worry about it. However, we should not be paralyzed to avoid delaying the treatment and affecting fertility if it develops.