A man’s vas deferens is located inside the scrotum and then along the spermatic cord and then into the prostate. The man’s vas deferens is primarily used to transport sperm inside the seminal vesicles and then eject them out of the body. The vas deferens is a transport channel, and if it becomes inflamed or narrowed, it may lead to a decrease in sperm, which can affect the quality of semen, a condition that can lead to infertility. Therefore, if a patient has these problems, he or she needs to go to the hospital in time to have the relevant examination to make a clear diagnosis.