My wife has been to 3 doctors and 3 different hospitals but no one can tell us what is wrong.?

My wife had gastric byp 12 yrs ago. Over the years she lost and lost more weight. In the past 2 months she has been swelling from her feet to her hips rock hard to the touch. She has lost some teeth and hair also. All the doctors have done is sent her home with vitamins, IV bags, and antibiotics. Still no results. I am beginning to think she will die before they find out what is wrong. No heart or liver problems, they have been checked. She has low blood pressure. What is causing the swelling??? Someone HELP before it's too late. Also is there a doctor like HOUSE anywhere and what is his number?!