You have achy pain in the leg and cannot bend and straighten the knee. In addition, you have difficulty standing on your feet long. In the case, apply 3 moxa cones at acupuncture point RN7 (??), and apply acupuncture at acupuncture point RN12 (??).
Apply 5 moxa cones each at both the ends of the popliteal crease. And then, have two people extinguish each one by blowing at the same time. Each one should feel moxa heat. Otherwise, there would be no healing.