VasectomyPain.Org

http://en.wikipedia.org/wiki/Post_vasectomy_pain_syndrome - the Wikipedia entry for PVPS, while brief, does list many references. 

http://www.dadsagain.com/ - a site advertising the services of Dr. Sheldon Marks and Dr. Peter Burrows for Vasectomy reversals. I include it here as they have done many reversals for pain. (not only for men seeking to regain fertility) They have an informational site to describe post-vasectomy pain issues at: http://www.post-vasectomy-pain.com/

http://postvasectomypain.com/ - a site written for an urologist (Dr. Neil Pollock) who performs vasectomies as well as vasectomy reversals - for Canadians, but still helpful

To its webmaster’s credit, www.vasectomy-information.com is comprehensive and lists the most common risks and the less common risk of post-vasectomy pain syndrome. Few other sites can match the detail and medical references of this website.

(See http://www.vasectomy-information.com/moreinfo/risks.htm)

The best review article for PVPS: http://www.andrologyjournal.org/cgi/content/full/24/3/293

A forum featuring PVPS questions:

http://www.vasectomy-information.com/wordpress/?cat=14

Our PVP support group is here:

http://health.groups.yahoo.com/group/VasectomyPain/

An online forum for "Problems in the Bedroom" related to vasectomy:

http://www.revolutionhealth.com/forums/mens-health/bedroom/102817?page=1 

http://www.medhelp.org/HealthTopics/Vasectomy.html has alot of post-vasectomy questions and answers. There are certainly a lot of men out there with the same questions. 

http://www.dontfixit.org is a site that has a lot of references and quotes from the medical literature as well as PVP forum archive

1. J Urol 1997 Feb:157(2):518-20 Vasectomy reversal for treatment of the post-vasectomy pain syndrome.
2. BJU Int. 2007 Dec;100(6):1330-3. Epub 2007 Sep 10. The incidence of chronic scrotal pain after vasectomy: a prospective audit.
3. J Urol 1996 Apr;155(4):1284-1286; Questionnaire-based outcomes study of nononcological post-vasectomy complications.
4. Br J Urol 1992 Feb;69(2):188-191; Chronic testicular pain following vasectomy.
5. Br J Urol 1991 Oct;68(4):407-413; Epididymectomy for post-vasectomy pain: histological review.
6. J Urol 1985 Sep;134(3):494-497; A late post-vasectomy syndrome.
7. Early and late morbidity after vasectomy: a comparison of chronic scrotal pain at 1 and 10 years. BJU Int. 2004 Mar;93(4):571-4.
   

Here is the main problem with post-vasectomy pain. Its incidence for a given man cannot be predicted before the procedure and the consequences can be catastrophic.

A rare outcome? It depends on what you read. The real question is, "Do you feel lucky?" Could you end up in the 5 to 10% of post-vasectomy patients with chronic pain that affects quality of life? The phenomena is truly a "Black Swan". Rare enough to be written off as unlikely. If it is 5%, then 25,000 new sufferers are created each year in the U.S. alone. Now you know about the "Black Swan", (rare, unpredictable event with significant impact) so you can make an informed decision about risking chronic genital pain and affecting your sexual function. Over 70% of men are satisfied with their vasectomy. (Some studies list over 90% satisfaction rates.) Clearly, those that develop chronic pain are not. At least having read this site, you won't feel foolish if you are in the group affected by chronic post-vasectomy testicular or scrotal pain.