I am experiencing knee stiffness and knee weakness. the following also describes me: difficulty walking. what should i do?

? Arthritis: Unless you have recently started new physical activity such as jogging, you may need to evaluated for possible arthritis. Stiffness does suggest inflammation and you probably should see a physician for possible labs or xrays. Again, if its only been a few days and some new activity was done you could wait a few days since that should resolve. If you have no explanation for the problems see a doc