I has been quite a while since I made changes to the article.  So, I'm not sure what I was thinking at the time.  I think the section has some use.  Pain has a biologic function and its location is often key to identifying its cause.  Other factors are the onset of the pain, its character, intensity, provoking factors, alleviating factor, quality and change with time. It could be split-out into a separate article and made a lot longer.  If you want more opinions from people that edit medicine-related articles, you can solicit more opinions at WP:MED.   T|C