Very thin sperm may be caused by frequent emission of semen, prostatitis or seminal vesiculitis, varicocele, etc. Different causative factors will lead to different treatments, including medication and surgery. 1. Frequent ejaculation: for example, excessive sexual intercourse or frequent masturbation will make the semen very thin, mainly by limiting the number of sexual intercourse and controlling the frequency of masturbation, which may gradually return to normal without other treatments. 2. Prostatitis or seminal vesiculitis: prostatitis and seminal vesiculitis can also lead to thin semen, which may be accompanied by ejaculatory pain, hematospermia and other symptoms. After diagnosis, antibacterial drugs should be used to treat the disease, such as azithromycin, levofloxacin and ciprofloxacin. 3. Varicose veins: For very thin semen caused by varicose veins, when it affects male fertility, surgical treatment is needed, such as laparoscopic high ligation of the spermatic vein. During the treatment, you should follow the doctor’s instructions, safe and reasonable use of medication, and to do a good job in all aspects of care.