Tandon, S., & Sabanegh, E., Jr. (2008). Chronic pain after vasectomy: a diagnostic and treatment dilemma. BJU International, 102(2), 166–169. doi:10.1111/j.1464-410X.2008.07602.x
PVPS is disappointingly common and difficult to treat. Although early pain lasting for a few weeks is fairly common after vasectomy (present in up to 30% of men), long-term pain requiring some kind of intervention or surgical therapy occurs in up to one in 1000 vasectomized men . McMahon et al.  noted that although half of the patients who reported complications after surgery had long-term discomfort, there was no obvious relationship of pain with immediate haematoma or infection.