T.F.
Hi F., I have the same problem and I appreciate you starting this thread as it gets closer to shorts weather. I don't have any solutions to suggest but did want to mention something to you....dark knees can be one symptom of a Thyroid issue. http://thyroid.about.com/library/links/blthyroid.htm There are so many symptoms but I thought it worth mentioning incase it helped you or someone else. Plain old scars will do the same thing and who didn't bang up their knees as a kid? (just like our kids are doing now).