Brown impurities in sperm usually refers to brown impurities in semen. The possible causes are inflammatory substances caused by infections in the reproductive tract, or brown blood clots formed by trauma. The semen is composed of sperm and seminal plasma, sperm is produced in the testes, seminal plasma is a mixture of fluid secreted by the testes epididymis, fluid secreted by the seminal vesicles, fluid secreted by the prostate gland, etc. 1. Reproductive tract infection: The common cause of reproductive tract infection is bacterial infection, which may also be mycoplasma or chlamydia infection, and the sites of infection include testes, epididymis, seminal vesicles, prostate gland, etc., which can lead to the secretion of brown inflammatory substances, which can lead to brown impurities in the semen and may be accompanied by symptoms such as frequent urination, urgent urination, incomplete urination, perineal swelling and pain, and swelling and pain in the testicles and epididymis. The diagnosis can be basically confirmed through blood and urine routine and ultrasound examination, and generally requires the use of antibiotics for treatment, such as cefixime, levofloxacin, roxithromycin, azithromycin, etc.; 2. Trauma: If the testicular blood vessels rupture due to trauma, it can lead to semen with blood, which may also lead to brown impurities in semen, and the brown impurities are blood clots. It may generally be accompanied by symptoms such as painful ejaculation, and may also cause symptoms such as frequent urination, urgent urination, and incomplete urination. In terms of treatment, anti-inflammatory treatment is generally required, such as the use of cefixime, levofloxacin and other drugs, and if conservative treatment is ineffective, surgery is recommended.