I trust that my cortisone shot was appropriate under the circumstances. What I have is basically chronic inflammation (and I had diagnostics to rule out everything else, including xray and MRI) from a very bad fall in November, and we tried all the other standard methods (anti-inflammatories, ice, rest, rehab, acupuncture, diet change, supplements) and the inflammation just won't go away, probably because my knee isn't tracking correctly (I'm working on that with my chiropractor). My ortho will only give me two shots, and we only resorted to that because I am going on a bike trip in Italy in May, so I know this isn't a solution to the underlying problem.