I'm working on my posts so I can post links. My pain feels like ordinary chondromalacia or tendinitis. Just plain old aching around the patella, which gets worse with activity. So over the years I've had about every treatment for those two possibilities. I probably had three dozen Synvisc injections and eventually developed an allergic reaction to it. I even had platelet rich plasma therapy. I have had peripheral neuropathy in my feet for the past five years and that has the typical pins and needles, and sensitivity symptoms. The SCS helps with that too.