I've been taking water pills for years now and my legs and feet are stilll swollen! I don't even have to be walking for long hours for this to happen, I spent most of the time riding a motorized mobility scooter at a theme park and my right foot was HUGE. I have a sprained right knee, a pinched nerve in my low back, and swelling in my right leg and foot, some in my left but not as much. I feel nerve pain down both legs to my feet, so much so that I couldn't really walk yesterday morning.
I don't think any doctors understand, I do believe I have a doc. who cares about his patients because I asked him if my thoracic kyphosis was going to get worse and he just looked at me with a sad look on his face and nodded his head because he didn't really want to tell me the bad news.