The vas deferens pain after ejaculation, possible causes: 1, vas deferens infection, young men often occur after unclean sexual contact, mostly due to mycoplasma, chlamydia or gonococcal infection, can appear after the completion of ejaculation vas deferens pain, inflammation can further spread to the testes, epididymis and scrotal swelling, and older men are often seen in prostate hyperplasia, after the completion of ejaculation because of increased urethral resistance, so it will The urethra may be a little bit of urine refluxed into the vas deferens after ejaculation, causing swelling and pain in the vas deferens. If the pain continues to be heavy and long, anti-infection treatment is needed. 2, there are varicose veins of the spermatic cord, during ejaculation or sexual activity, the veins of the spermatic cord are curved and cause local swelling and swelling, after ejaculation and semen discharge, the swelling and pain can be gradually relieved, and the duration is not long, the pain is more obvious in patients with frequent sexual activity, and the symptoms can be reduced after abstinence or long rest.