The odds are it's venous insufficiency. There's basically one way valves in the veins in the lower legs that help blood return to the heart. In varicose veins these valves have failed, so blood pools at the lowest point (near the feet). The medically approved solutions are to keep the legs moving, avoiding prolonged sitting or standing, and compression stockings, as has already been suggested by FreeLanceR.
Homeopathically, I don't know what can be done. It seems likely her docs have ruled out some of the alternatives that might be alarming (like blood clots, heart issues, etc.). Skin care is critical, as she's likely to be prone to skin ulcers, infections and slow healing because of the poor circulation in the area.
Again, I'm not a medical professional. Don't take this as medical advice, just some guy on the internet's two cents. Wiki or Web MD the signs and symptoms for stroke, heart attack and PE and be familiar with them. Delay can lead to brain loss, heart damage, lung loss, and death. Seconds count.