Ejaculated semen is red in the clinic is known as hematospermia, its causes are very diverse, such as infections, tumors, systemic factors, etc. Patients need to use appropriate medications according to different causes, including antibiotics, antihypertensives, coagulation factors and so on. Tumors and other causes of medication are generally ineffective and require surgical treatment. 1. Infection: Genitourinary infection is a common cause of red semen ejaculation, such as seminal vesiculitis, prostatitis, epididymitis, etc. Patients need to use sensitive antibiotic drugs according to the pathogen for treatment, commonly used erythromycin, clarithromycin, norfloxacin and so on. 2. Tumor: red semen does not exclude the possibility of tumor, such as smooth muscle tumor, testicular cancer, prostate cancer, etc. In this case, the patient needs to consider surgery in time, such as testicular cancer in the early stage of radical orchiectomy; prostate cancer in the early stage of prostatectomy can be used, and so on. 3. Systemic factors: severe hypertension, lymphoma, leukemia, hemophilia and other systemic diseases may also cause red semen, which need to be treated according to the primary disease, such as severe hypertension need to use atorvastatin, valsartan and other drugs to lower blood pressure; hemophiliacs need to supplement clotting factors in time. If men find that the ejaculate is red, they should seek medical attention.