Fell on my knees10 wks ago.had x-rays on my right knee.no fracture on it.it still hurts when i walk&has some numbness sometimes.today,i danced(did some "twist dancing"&other)for about 25-30 minutes.can the dance reinjure my knee?pain didn't get worse

Yes but unlikely.: 10 weeks is a good enough length of time for the tendons, muscles, & cartilage off the knee to heal provided there was no tear or fracture. So the chances of RE-injuring your knee is low. Dancing can INJURE the knee (in a new way), of course. If you experience soreness or pain (anywhere- not just the knee), the 1st step for immediate treatment is to ice it - keep it cold. You can often do it daily