You are absolutely right to be concerned about this and I'm happy to hear you're ready to pursue proper treatments or at least an evaluation.

Here is a doctor who is phenomenal in his background with exotics and though I'm not sure if he's near you (I'm in Sac county) I'm sure that if you contact him or his office they can guide you.

http://drexotic.com/bio_jenkins.htm

Until then, the first step is to remove your amourous buddy's source of pleasure. Though usually a perch with males, sometimes it's an object and there could be an irritation caused during the act that's hurting him (though not enough to stop, apparently).

Change perch locations and types - substitute softer rope perches or fruit woods (bird safe) and remove objects that might be triggering his behavior.

If you see him start to do this, distract him - gently - no yelling at him or scaring him of course. We don't want emotional problems on top of the physical ones.

Since it might not just be an injury issue and could be something else - the vet visit is your best bet.

Please let me know how you do.

Keep up the great job!