Medical diagnosis is the process of determining which disease or condition explains a person's symptoms and signs.It basically enables the doctor understand what disease is the patient going through.
Diagnosis is often challenging, because many signs and symptoms are nonspecific and different diseases also have them.
For example, redness of the skin is a sign of many disorders and thus does not tell the healthcare professional what is wrong.
Injury Prevention, sorry I just saw this question.
I believe that she has Oliguria. It is the medical term for a decreased output of urine. Aside from that, there are many potential causes and the two that we see her are dehydration and a urinary tract obstruction. She is decreasing her normal fluid intake. Your body can't replace the fluids that you're losing. When this happens your kidneys retain as much fluid as they can. As for urinary tract obstruction, she has increased her protein intake. A high-protein diet can inhibit your body from eliminating all the waste products of protein metabolism. This can cause a blockage in your kidneys. This explains why she has flank pain and a high fever.