Effectiveness of Press Tack Needle among patients with knee pain

INTERVENTION: A computer program was used to randomly allocate 100 participants with chronic knee pain to either a Press Needle group or a Sham Press Needle group. Participants in both groups received intervention at the painful points "5 points", they were pressed for two days. The Press Needle used in this trial was Press Needle manufactured by SEIRIN Inc "length;0.6mm, diameter;0.2mm". For the Sham Press Needle group, Sham Press Needle by which the needle was removed was used. Evaluation was performed before the first intervention, after the two days, seven days and one month. In the second intervention, not using Sham Press Needle, both groups intervene by Press Needle. Other procedure is the same as that of first time intervention. CONDITION: Osteoarthritis of the knee PRIMARY OUTCOME: WOMAC (western ontario mcmaster universities osteoarthritis index), japanese version . SECONDARY OUTCOME: Visual analog scale; SF‐8; Questionnaire on adverse events INCLUSION CRITERIA: 1,Man and Woman aged 65 and over. 2,Kellgren‐Lawrence clasification, grad 1 or more. 3,Duration of disease more than 3 months. 4,Injection in an articulation genus is not carried out within four weeks. 5,Tere is no acupuncture to knee within three months. 6,A neurological unusual view is not seen.