I wonder if anyone has suggestions for the following? Recent knee replacement recovery was going well, until approximately 1 month ago. Surgery was in July 08. Currently when walking or standing for approximately 15 minutes, the muscles in my lower back become numb. The sensation is similar to the focus trying to keep from falling. I know the spine is arthritic, but my posing the question to doctors seems to draw only a "ho hum" response.
Lower back of both legs becomes numb also and it is becoming a real annoyance.