Why does my knee pains and burns when i stand? i work long hours standing, typically continuous standing 2 hours or dis-continuous standing 9 hours. 6 days a week. i have started to feel pain in my knee while standing and sitting down any time now?

Your knee symptoms could be considered an occupational disease which is due to prolonged standing. Problem could be originating from the involved knee but it could be from the ipsilateral hip or from the spine disease. You should see an orthopedist. Changing job with less prolonged standing should be considered. Good luck.

Have you tried different types of shoes? Having good support while standing many hours is very important. Orthotics might be considered. Have you considered exercise to strengthen your muscles. Your symptoms are consistent with an overuse type of injury. A podiatrist can help with these concerns