Capsicum (hot pepper) has been used topically for some time. Clinical research is being done on new treatments — including applying pure capsicum to certain nerve endings exposed during an operation. The treatment appears to be very effective against chronic pain — and it lasts for several weeks or months.
Here’s are a few links:
http://news.bbc.co.uk/2/hi/health/4993576.stm
http://www.mskreport.com/articles.cfm?articleID=251
http://blogs.orlandosentinel.com/features_healthblog/2007/11/hot-sauce-may-d.html
The answers aren't lining up with reality.