I can't answer that part. No one knows what causes RSD in some people and not others.

There are hints, that it is an inflammatory process that sets it off. Some studies from Britain done on trauma and surgical patients for ankle or wrist surgery avoided RSD when given Vit C in doses of 500mg a day or 1000mg a day for 50 days.

That seemed to block the process somehow. Also there are some papers showing early use of nifedipine or similar calcium channel blockers may help in the early stages.

But the actual reasons for the cause remain elusive.

By paying attention to the chronic pain issue you may reduce your pain levels, by fixing the serotonin levels. Serotonin is involved in the perception of pain signals in the brain.

You have complex issues, in other words.

And also if you were given fluoroquinolones for those infections, those drugs cause neuropathies. Our PN forum has information about that.
Cipro, Levaquin, Avelox mostly. Also Zyvox and Flagyl (metronidazole) have done it by other mechanisms.
http://neurotalk.psychcentral.com/thread122889.html