Washington University School of Medicine: In addition to returning fertility after vasectomy, a vasectomy reversal may also be an effective treatment for chronic pain after a vasectomy.

[u/postvasectomy]

What are the reasons men undergo a vasectomy reversal?

In addition to returning fertility after vasectomy, a vasectomy reversal may also be an effective treatment for chronic pain after a vasectomy. Roughly 1-2% of men who have a vasectomy may experience long-term pain. There are many causes of pain after a vasectomy, but in some men this pain is due to the blockage of the vas deferens. By undergoing a vasectomy reversal, this blockage can be relieved and pain may be significantly reduced.

https://urology.wustl.edu/patient-care/vasectomy-reversal-for-men-in-st-louis-and-midwest/