The area between the scrotum and anus is called perineum and pain in this area can be due to many causes. It can be due to perineal trauma like during cycling, urethral trauma, urtehritis, prostate infections, gonorrhea, perianal abscess, anal fissure or fistula, bladder infections or any obstruction in the urethra. A detailed examination by a urologist along with a comprehensive profile of investigations is needed.
Hope it helps. Take care.
Hi I have been pestered by prostatitis since I was about 22 or sooner. I allways have some pain in between the rectum and scrotum. 2 years ago while in hospital with a kidney infection and pneumonia I discovered that I have a fistula between the prostate and scrotum. This might have been caused by self catheterization due to a neurogenic bladder. This time the pain in between the rectum and scrotum is almost constant. I also have a stabing sensation in the penis now and than.
I don't know if this is of any help to you, but I figgered that I should share my experience in the hope that might be able to benefit from it.
All the best.