I'm black 64 year old female, getting constant pain down my right leg, Pain seems to move between, 1 of 3 places. (1. just above the right knee on the right side of my right leg, (2. The right side or left side of my right knee, (3. just below the right knee on the right side around the calf area. My husband thinks it is a pinched nerve in my back that is causing this. I've never had an injury to my back, but all this started with pain in my lower back near my waist line after I had a left mastectomy surgery performed in 2000 or 2001. From that it has gradually migrated to what I described in my opening description. I'm looking for some professional advice....Please help me.