Most patients presenting with anorectal symptoms will have benign anorectal pathology and can be successfully treated in the primary care setting; however.
I didn't invent the concept, it's been around for a while, but I have found it to be particularly effective at getting to the bottom of any issue.
Find the basic underlying quality or cause of something. For example, He was determined to get to the bottom of the problem. [Late s] Also see at bottom.