My ortho did an MRI and said my left knee has an old medial meniscus tear associated with a cyst. He said he could do quick surgery involving 3 holes in my knee to clean up the tear and examine my knee and that the surgery would take 20-30 mins and that I would be able to walk immediately afterwards and all healed in a few days. Now my knee acts up if I walk too much or attempt certain twisting motions such as in yoga, and the PT can press on certain points which really hurt. Should I get the surgery? Should I get these products in hope that they will actually heal the tear? The doc says as long as there is a tear in there it will continually be aggravated and then there is this cyst which I am assuming is there because this tear has been there a long time. The nurse also told me there is no blood flow there.  What to do?