Many of the websites out there have information (and even mis-information) colored by advertising/marketing. These are some excellent sites that I have reviewed that will give you trustworthy, objective information about your condition:
You will see a skeleton - simply click on which body part is painful and a list of topics will appear. The topics include sports injuries, arthritis topics, and fractures. Find your injury and click on it to read more about your condition and possible treatment options.
Arthritis Today (from the Arthritis Foundation)