Mid September I felt a 'pop' and 'fullness' at the back of my knee. It didn't hurt until about 2 weeks later. I had heard about Laser Therapy from friends and decided I would try this therapy. After a few treatments I was pain free. Then on October 25 my knee buckled and I was off my feet due to the pain. However, I persisted with therapy and was amazed at how quickly I improved to the point of being pain free within a week.