I read a interesting article about knee pain treatment in Dailymail .co.uk.they mention a lot of different therapies,I just quote a acupuncture part for you.

THE EVIDENCE: Dutch researchers compared acupuncture to a sham treatment where needles were placed in areas not associated with healing, and found neither helped pain or knee function in osteoarthritis. But scientists at the Universities of Exeter and Plymouth have found that acupuncture is better than placebo: 'Acupuncture is significantly superior to sham acupuncture in improving pain and function in patients with chronic knee pain.'

ARTHRITIS RESEARCH CAMPAIGN SAYS: 'Our recent trial of acupuncture and knee pain at Keele University showed it was no more effective than a course of exercise-based physiotherapy. Results from trials again demonstrate mixed efficacy results.'

BEST FOR: Can't be recommended unless further research can demonstrate which types of knee pain might benefit

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Placebo,placebo,....I have a little article about this,please spend more time to learn what is real current Chinese acupuncture.

The meniscus is the wedge of cartilage in the knee that stops the end of the femur (thighbone) rubbing directly on the top of the tibia (the main shinbone). The meniscus is actually two structures on each side of the knee joint.