If I were her, I would get a new doctor. This one seems pretty uninterested in helping her to find the true cause of her problem. She had to make him run more tests? He should be more worried than that if she keeps coming in with blood in her urine and pain. It may be that she has bad kidneys and that this diet isn't good for her (as Dr. Atkins points out), but it may be something MUCH more scary than that, and I'd want a doctor who focused on finding the problem rather than picking what he/she thinks is the problem and sending her home that first time. I hope she's okay.